Pub Date : 2021-10-31DOI: 10.26418/indonesian.v4i2.47674
Anggelita Anggelita, Endah Sayekti, L. Destiarti
The isolation of steroid compounds from Adam Hawa leaves has been carried out through maceration, partition, separation, and purification. The relatively pure BF2 isolate was 7 mg amorphous and with a melting point of 158-1700C. Results of 1H-NMR spectrum analysis with CDCl3 solvent, 500 MHz δH: 7,53 (d, J= 5,4 Hz, = C-H ); 7,72 (d, J= 5,7 Hz, = C-H); 5,35 (1H, d, J=5,15 Hz, =C-H); 3,51 (1H, m, Ar-CH), 0,93 (d, J= 6,2 Hz, 3H), 0,86 (3H, s), 0,84 (3H, s), 0,81 (3H, m), 0,84 (d, J= 5,2 Hz, 3H). The 1H-NMR spectrum of isolate BF2 similar to the 1H-NMR spectrum of ergosterol peroxide and ergosterol. So it is predicted that BF2 isolate has resembled structures with those compounds. In vitro sunscreen tests were performed on BF2 isolates and methanol extracts using a UV-Vis spectrometer. The SPF values of BF2 isolate and methanol extract at concentrations (ppm) of 120, 140, 160 and 180 respectively were 1.913; 1,684; 2252; 2483; and also 1,428; 1,655; 2,465; 1883. The results showed that BF2 isolate and methanol extract had weak activity as sunscreen
{"title":"SENYAWA GOLONGAN STEROID DARI DAUN ADAM HAWA (Rhoeo discolor (L,Her.) Hance) DAN UJI SUN PROTECTING FACTOR STEROID COMPOUND FROM ADAM HAWA (Rhoeo discolor (L,Her.) Hance) LEAVES AND SUN PROTECTING FACTOR TEST","authors":"Anggelita Anggelita, Endah Sayekti, L. Destiarti","doi":"10.26418/indonesian.v4i2.47674","DOIUrl":"https://doi.org/10.26418/indonesian.v4i2.47674","url":null,"abstract":"The isolation of steroid compounds from Adam Hawa leaves has been carried out through maceration, partition, separation, and purification. The relatively pure BF2 isolate was 7 mg amorphous and with a melting point of 158-1700C. Results of 1H-NMR spectrum analysis with CDCl3 solvent, 500 MHz δH: 7,53 (d, J= 5,4 Hz, = C-H ); 7,72 (d, J= 5,7 Hz, = C-H); 5,35 (1H, d, J=5,15 Hz, =C-H); 3,51 (1H, m, Ar-CH), 0,93 (d, J= 6,2 Hz, 3H), 0,86 (3H, s), 0,84 (3H, s), 0,81 (3H, m), 0,84 (d, J= 5,2 Hz, 3H). The 1H-NMR spectrum of isolate BF2 similar to the 1H-NMR spectrum of ergosterol peroxide and ergosterol. So it is predicted that BF2 isolate has resembled structures with those compounds. In vitro sunscreen tests were performed on BF2 isolates and methanol extracts using a UV-Vis spectrometer. The SPF values of BF2 isolate and methanol extract at concentrations (ppm) of 120, 140, 160 and 180 respectively were 1.913; 1,684; 2252; 2483; and also 1,428; 1,655; 2,465; 1883. The results showed that BF2 isolate and methanol extract had weak activity as sunscreen","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83823443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-31DOI: 10.26418/indonesian.v4i2.46976
Annisa Furqonita, A. B. Aritonang, M. A. Wibowo
The synthesis of Bi3+ doped TiO2 was carried out using the sol-gel method with the precursor solution of titanium tetraisopropoxide (TTiP). Bi3+ cation dopant is done to reduce the energy of the TiO2 band gap so that it can be active in the visible light region. The synthesized Bi(III) –TiO2 photocatalyst was characterized using DRS UV-Vis, FTIR, and EDX. The results of the DRS UV-Vis analysis showed that 1% Bi(III) –TiO2 photocatalyst had a bandgap energy of 2.79 eV or equivalent to a wavelength of 469.97 nm. Infrared spectra show that there is a unique absorption at the wave number 956,56 cm-1 which is the absorption of the vibration Bi-O-Ti group. Photocatalyst Bi(III) -TiO2 was then tested for antibacterial activity against E. coli in polluted water. The activity test was carried out using the turbidimetric method by UV-vis spectrophotometry. The results of the activity test for 120 minutes with the help of visible light showed that the photocatalyst Bi(III) –TiO21% had the best antibacterial activity. The decrease in the number of E. coli in the water reached 48.54%.
{"title":"SINTESIS TiO2 TERDOPING Bi3+ DAN UJI AKTIVITAS FOTOKATALISIS ANTIBAKTERI E.coli DENGAN BANTUAN SINAR TAMPAK (SYNTHESIS OF Bi3+ DOPED TiO2 AND PHOTOCATALYSIS ACTIVITY TEST OF E.coli ANTIBACTERIA UNDER VISIBLE IRRADIATION)","authors":"Annisa Furqonita, A. B. Aritonang, M. A. Wibowo","doi":"10.26418/indonesian.v4i2.46976","DOIUrl":"https://doi.org/10.26418/indonesian.v4i2.46976","url":null,"abstract":"The synthesis of Bi3+ doped TiO2 was carried out using the sol-gel method with the precursor solution of titanium tetraisopropoxide (TTiP). Bi3+ cation dopant is done to reduce the energy of the TiO2 band gap so that it can be active in the visible light region. The synthesized Bi(III) –TiO2 photocatalyst was characterized using DRS UV-Vis, FTIR, and EDX. The results of the DRS UV-Vis analysis showed that 1% Bi(III) –TiO2 photocatalyst had a bandgap energy of 2.79 eV or equivalent to a wavelength of 469.97 nm. Infrared spectra show that there is a unique absorption at the wave number 956,56 cm-1 which is the absorption of the vibration Bi-O-Ti group. Photocatalyst Bi(III) -TiO2 was then tested for antibacterial activity against E. coli in polluted water. The activity test was carried out using the turbidimetric method by UV-vis spectrophotometry. The results of the activity test for 120 minutes with the help of visible light showed that the photocatalyst Bi(III) –TiO21% had the best antibacterial activity. The decrease in the number of E. coli in the water reached 48.54%.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75549691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.26418/indonesian.v3i1.46505
Endah Sayekti, Jumina Jumina, Dwi Siswanta, M. Mustofa
The aims of this study was to synthesize of C-4-alyloxy-3-methoxyphenylcalix[4]resorcinarene (3). The syntheses was conducted by condensation reaction of resorcinol with 4-allyloxy-3-methoxybenzaldehyde (2) in ethanol with hydrochloric acid as a catalyst. The (2) compound was synthesized by the reaction of the 4-hydroxy-3-methoxybenzaldehyde (vanillin) (1) via allylation reaction using an allylbromide with the sodium metal as a catalyst in ethanol. A (3) compound was orange solid. m.p. of 176–177 °C (dec.). Yield (78%). FTIR (KBr, ν; cm-1): 3441 (-OH); 3086 and 3008 (Csp2-H); 2939 (Csp3-H ); 1612 (C=C aliphatic); 1512 (C=C aromatic); 1427 (>CH- methine); 1234, 1211, 1080 and 1018 (C-O-C asymmetric); 925 (C=CH2 terminal). 1H-NMR (DMSO-d6; 500 MHz) δ (ppm): 8,50 (8H, s, OH); 6.43 (4H, s, ArC-H); 6,36-6,38 (4H, d, J=10 Hz); 6.32 (4H, s, ArC-H); 6.26-6.28 (4H, d, J=10 Hz); 6.13 (4H, s, ArC-H); 6.00-6.05 (4H, m, =C-H); 5.38-5.40 (4H, d, J=10 Hz); 5.31 (4H, s, >C-H methine); 5.16-5.18 (4H, d, J=10 Hz); 4.34-4.36 (8H, d, J=10 Hz); 3.29 (12H, s, -OCH3). 13C-NMR (DMSO-d6; 500 MHz) dC (ppm): 33 (4 x CH methine); 55 (4 x CH3); 69 (4 x CH2-); 101 (4 x ArC-H); 112 (4 x ArC-H); 113 (4 x ArC-H); 116 (4 x =CH allyl terminal); 120 (4 x ArC-H); 122 (8x ArC-); 132 (4 x ArC-H); 134 (4 x =CH allyl); 137 (4 x ArC-); 145 (4 x ArC-O); 148 (4 x ArC-O); 152 (8 x ArC-OH). MS (ESI) m/z: 1137.5 (M+). Anticancer evaluation was performed on (3) compound by MTT (3-(4,5-dimethyltiazole-2-yl)-2,5-diphenyltetrazolium bromide) method showed that (3) compound has a cytotoxic activity against HeLa and T47D cells which IC50 value respectively are 13,58 and 65,26 µg/mL.
{"title":"SINTESIS DAN AKTIVITAS ANTIKANKER SENYAWA C-4-ALILOKSI-3-METOKSIFENILKALIKS[4]RESORSINARENA","authors":"Endah Sayekti, Jumina Jumina, Dwi Siswanta, M. Mustofa","doi":"10.26418/indonesian.v3i1.46505","DOIUrl":"https://doi.org/10.26418/indonesian.v3i1.46505","url":null,"abstract":"The aims of this study was to synthesize of C-4-alyloxy-3-methoxyphenylcalix[4]resorcinarene (3). The syntheses was conducted by condensation reaction of resorcinol with 4-allyloxy-3-methoxybenzaldehyde (2) in ethanol with hydrochloric acid as a catalyst. The (2) compound was synthesized by the reaction of the 4-hydroxy-3-methoxybenzaldehyde (vanillin) (1) via allylation reaction using an allylbromide with the sodium metal as a catalyst in ethanol. A (3) compound was orange solid. m.p. of 176–177 °C (dec.). Yield (78%). FTIR (KBr, ν; cm-1): 3441 (-OH); 3086 and 3008 (Csp2-H); 2939 (Csp3-H ); 1612 (C=C aliphatic); 1512 (C=C aromatic); 1427 (>CH- methine); 1234, 1211, 1080 and 1018 (C-O-C asymmetric); 925 (C=CH2 terminal). 1H-NMR (DMSO-d6; 500 MHz) δ (ppm): 8,50 (8H, s, OH); 6.43 (4H, s, ArC-H); 6,36-6,38 (4H, d, J=10 Hz); 6.32 (4H, s, ArC-H); 6.26-6.28 (4H, d, J=10 Hz); 6.13 (4H, s, ArC-H); 6.00-6.05 (4H, m, =C-H); 5.38-5.40 (4H, d, J=10 Hz); 5.31 (4H, s, >C-H methine); 5.16-5.18 (4H, d, J=10 Hz); 4.34-4.36 (8H, d, J=10 Hz); 3.29 (12H, s, -OCH3). 13C-NMR (DMSO-d6; 500 MHz) dC (ppm): 33 (4 x CH methine); 55 (4 x CH3); 69 (4 x CH2-); 101 (4 x ArC-H); 112 (4 x ArC-H); 113 (4 x ArC-H); 116 (4 x =CH allyl terminal); 120 (4 x ArC-H); 122 (8x ArC-); 132 (4 x ArC-H); 134 (4 x =CH allyl); 137 (4 x ArC-); 145 (4 x ArC-O); 148 (4 x ArC-O); 152 (8 x ArC-OH). MS (ESI) m/z: 1137.5 (M+). Anticancer evaluation was performed on (3) compound by MTT (3-(4,5-dimethyltiazole-2-yl)-2,5-diphenyltetrazolium bromide) method showed that (3) compound has a cytotoxic activity against HeLa and T47D cells which IC50 value respectively are 13,58 and 65,26 µg/mL.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90690260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.26418/indonesian.v3i3.44149
I. H. Silalahi, Julan Julan, Muhammad Yusprianto, R. Rudiyansyah
The copper (II)-chlorophyll complex was prepared from the reaction between the chlorophyll isolated from cassava leaves and the metal ion precursor, CuSO4.5H2O in methanol under reflux for four hours. The FTIR spectra of the reaction product compared to the chlorophyll spectra show an indication of a complexation through metal coordination with the N atom from the phyrol ring replacing the magnesium (II) ion in chlorophyll.This assumption is drawn based on changes on FTIR spectra, i.e. vibration absorption originating from the CN and NH groups in the porphyrin ring and the appearance of the distinctive vibration band of nitrogen-metal bonds which is annotated as Cu-N groups at 599.88 cm-1. Another sign is the change in the OH and CO vibration bands which imply changes in aggregate properties that occur through inter-molecular interactions due to the introduction of copper (II) metal into the chlorophyll structure. The formation of copper (II)-chlorophyll compounds is also shown from the results of atomic absorption spectroscopy by recording copper metal in the product and reducing magnesium metal concentration. UV-vis spectra of chlorophyll in methanol show a characteristic band in the dark area (Soret band) at a maximum wavelength of 404 nm and the visible area (Q band) with the strongest intensity at 665 nm. These peaks appear to shift hypsochromically in the copper (II)-chlorophyll compound to 397 nm and 650 nm with higher absorptivity, indicating a change in the electronic transition of the chlorophyll after coordinating with the copper (II) ion. A new peak at 411 nm was also observed which is suggested to indicate that the copper (II) -chlorophyll complex is in an octahedral geometry in the aggregate coordinated via nitrogen atoms in the phyrol ring in place of the magnesium (II) ion.
{"title":"SINTESIS DAN TRANSISI ELEKTRONIK KOMPLEKS TEMBAGA (II)-KLOROFIL","authors":"I. H. Silalahi, Julan Julan, Muhammad Yusprianto, R. Rudiyansyah","doi":"10.26418/indonesian.v3i3.44149","DOIUrl":"https://doi.org/10.26418/indonesian.v3i3.44149","url":null,"abstract":"The copper (II)-chlorophyll complex was prepared from the reaction between the chlorophyll isolated from cassava leaves and the metal ion precursor, CuSO4.5H2O in methanol under reflux for four hours. The FTIR spectra of the reaction product compared to the chlorophyll spectra show an indication of a complexation through metal coordination with the N atom from the phyrol ring replacing the magnesium (II) ion in chlorophyll.This assumption is drawn based on changes on FTIR spectra, i.e. vibration absorption originating from the CN and NH groups in the porphyrin ring and the appearance of the distinctive vibration band of nitrogen-metal bonds which is annotated as Cu-N groups at 599.88 cm-1. Another sign is the change in the OH and CO vibration bands which imply changes in aggregate properties that occur through inter-molecular interactions due to the introduction of copper (II) metal into the chlorophyll structure. The formation of copper (II)-chlorophyll compounds is also shown from the results of atomic absorption spectroscopy by recording copper metal in the product and reducing magnesium metal concentration. UV-vis spectra of chlorophyll in methanol show a characteristic band in the dark area (Soret band) at a maximum wavelength of 404 nm and the visible area (Q band) with the strongest intensity at 665 nm. These peaks appear to shift hypsochromically in the copper (II)-chlorophyll compound to 397 nm and 650 nm with higher absorptivity, indicating a change in the electronic transition of the chlorophyll after coordinating with the copper (II) ion. A new peak at 411 nm was also observed which is suggested to indicate that the copper (II) -chlorophyll complex is in an octahedral geometry in the aggregate coordinated via nitrogen atoms in the phyrol ring in place of the magnesium (II) ion.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81364487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.26418/indonesian.v4i1.45758
D. Agustina, Risa Nofiani, I. H. Silalahi
Puya sand is a byproduct from local gold mining activities found in Sintang, West Kalimantan. Puya sand is usually left by the miners after the mining activity leaving a pile of abandoned sands. Mineral characterisation conducted by using XRD and XRF methods demonstrated that the sand contains valuable elements and mineral, i.e. zircon silicate, quartz and ilmenite. A simple physical flotation separation method removed quartz remaining material containing concentrated zircon silicate. XRD analysis by using Search-Match followed by amount calculation by using Rietveld refinement showed that the sand consists of zircon silicate (58.3%), ilmenite (35.2%) and anatase (6.5%). Elemental analysis by using XRF presented the percentage of Zr, Ti, Fe and Si is 41.0, 23.9, 13.06 and 8.3, respectively. Hafnium with 1.5% was also observed along with Th, U and rare earth elements (REEs), such as Nd, Y, Eu, and Yb.
{"title":"KOMPOSISI UNSUR DAN KARAKTERISTIK MINERAL PASIR PUYA DARI SINTANG, KALIMANTAN BARAT (ELEMENT COMPOSITION AND MINERAL CHARACTERISTIC OF PUYA SAND FROM SINTANG, WEST KALIMANTAN)","authors":"D. Agustina, Risa Nofiani, I. H. Silalahi","doi":"10.26418/indonesian.v4i1.45758","DOIUrl":"https://doi.org/10.26418/indonesian.v4i1.45758","url":null,"abstract":"Puya sand is a byproduct from local gold mining activities found in Sintang, West Kalimantan. Puya sand is usually left by the miners after the mining activity leaving a pile of abandoned sands. Mineral characterisation conducted by using XRD and XRF methods demonstrated that the sand contains valuable elements and mineral, i.e. zircon silicate, quartz and ilmenite. A simple physical flotation separation method removed quartz remaining material containing concentrated zircon silicate. XRD analysis by using Search-Match followed by amount calculation by using Rietveld refinement showed that the sand consists of zircon silicate (58.3%), ilmenite (35.2%) and anatase (6.5%). Elemental analysis by using XRF presented the percentage of Zr, Ti, Fe and Si is 41.0, 23.9, 13.06 and 8.3, respectively. Hafnium with 1.5% was also observed along with Th, U and rare earth elements (REEs), such as Nd, Y, Eu, and Yb.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78988924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.26418/indonesian.v3i1.46533
Pendi Wahyudi, A. Alimuddin, A. Shofiyani
Silica xerogel is a multi-functional material that is useful in many industrial applications. In this research, we synthesized surface-modified silica xerogel and studied the effect of aging time, i.e., 0, 3, 6, 12, and 18 hours to the hydrophobicity of the synthesized material. The synthesis was conducted by the sol-gel method using sodium silicate precursors and a citric acid catalyst. Meanwhile, the surface modification was carried out through the silylation reaction using trimethylchlorosilane (TMCS) reagent. The resulting materials were characterized using infrared spectrophotometry (FTIR) and X-ray diffraction (XRD) methods. Hydrophobicity was measured by the contact angle formed by the water droplet with the xerogel surface and the spreading time of the droplet to be dispersed entirely on the surface. The silica xerogel produced at all aging time variations has an amorphous phase, characterized by 2θ = 22-26o of the XRD pattern. Si-CH3 and C-H vibrations at 848 cm-1 and 2962 cm-1 present in the FTIR spectrumconfirm the success of surface modification. The increasing aging time enhances the contact angle and spreading time of water droplets on xerogels, viz., 130o to 135o,and 3h 10min to 3h 28 min, respectively. Thus, the xerogels produced by this research are hydrophobic.
{"title":"PENGARUH WAKTU AGING TERHADAP SIFAT HIDROFOBISITAS SILIKA XEROGEL TERMOFIDIFIKASI TRIMETILKLOROSILAN (EFFECT OF AGING TIME ON THE HYDROPHOBICITY OF SYNTHESIZED TRIMETHYLCHLOROSILANE-MODIFIED SILICA XEROGE)","authors":"Pendi Wahyudi, A. Alimuddin, A. Shofiyani","doi":"10.26418/indonesian.v3i1.46533","DOIUrl":"https://doi.org/10.26418/indonesian.v3i1.46533","url":null,"abstract":"Silica xerogel is a multi-functional material that is useful in many industrial applications. In this research, we synthesized surface-modified silica xerogel and studied the effect of aging time, i.e., 0, 3, 6, 12, and 18 hours to the hydrophobicity of the synthesized material. The synthesis was conducted by the sol-gel method using sodium silicate precursors and a citric acid catalyst. Meanwhile, the surface modification was carried out through the silylation reaction using trimethylchlorosilane (TMCS) reagent. The resulting materials were characterized using infrared spectrophotometry (FTIR) and X-ray diffraction (XRD) methods. Hydrophobicity was measured by the contact angle formed by the water droplet with the xerogel surface and the spreading time of the droplet to be dispersed entirely on the surface. The silica xerogel produced at all aging time variations has an amorphous phase, characterized by 2θ = 22-26o of the XRD pattern. Si-CH3 and C-H vibrations at 848 cm-1 and 2962 cm-1 present in the FTIR spectrumconfirm the success of surface modification. The increasing aging time enhances the contact angle and spreading time of water droplets on xerogels, viz., 130o to 135o,and 3h 10min to 3h 28 min, respectively. Thus, the xerogels produced by this research are hydrophobic.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79920584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.26418/indonesian.v3i3.44151
N. Rahayu, Gusrizal Gusrizal, Nurlina Nurlina
Silver nanoparticles (AgNPs) are one of the best plasmonic candidates that have been used in Surface Plasmon Resonance (SPR)-based nanosensors for the detection of metallic ions. In this research, AgNPs were prepared by the method using Eleutherine palmifolia (L.) Merr root ethanol extract. Silver nanoparticles were synthesized by reduction of silver nitrate with Eleutherine palmifolia (L.) Merr. Tuber extract (concentration of extract = 0,01%, pH = 11, volume ratio 1:1) in the boiling water bath for 90 minutes. The formation of silver nanoparticles was indicated by the appearance of yellow color and monitored using a UV-Visible spectrophotometer. The spectra showed the maximum peak at 401-405 nm. The resulted silver nanoparticles with the size of 10-20 nm were stable at least for 16 weeks.
{"title":"EKSTRAKK UMBI BAWANG DAYAK (Eleutherine palmifolia (L.) Merr.) SEBAGAI PEREDUKSI ION PERAK DALAM SINTESIS NANOPARTIKEL PERAK","authors":"N. Rahayu, Gusrizal Gusrizal, Nurlina Nurlina","doi":"10.26418/indonesian.v3i3.44151","DOIUrl":"https://doi.org/10.26418/indonesian.v3i3.44151","url":null,"abstract":"Silver nanoparticles (AgNPs) are one of the best plasmonic candidates that have been used in Surface Plasmon Resonance (SPR)-based nanosensors for the detection of metallic ions. In this research, AgNPs were prepared by the method using Eleutherine palmifolia (L.) Merr root ethanol extract. Silver nanoparticles were synthesized by reduction of silver nitrate with Eleutherine palmifolia (L.) Merr. Tuber extract (concentration of extract = 0,01%, pH = 11, volume ratio 1:1) in the boiling water bath for 90 minutes. The formation of silver nanoparticles was indicated by the appearance of yellow color and monitored using a UV-Visible spectrophotometer. The spectra showed the maximum peak at 401-405 nm. The resulted silver nanoparticles with the size of 10-20 nm were stable at least for 16 weeks.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87269858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.26418/indonesian.v3i3.44150
Kahar Muzakar, Adhitasari Suratman, R. Roto
Method validation of sodium dodecylbenzene sulfonate (SDBS) analysis in catfish by maceration and UV-Vis spectrophotometry using methylene blue active substances (MBAS) method was performed. The first stage of this research was method validation comprising correlation coefficient, sensitivity, Limit of Detection (LOD), Limit of Quantitation (LOQ), precision, and accuracy. The extraction of SDBS by maceration with methanol for 16 h and analysis by UV-Vis spectrophotometry using MBAS were performed. Then, this method was applied to analyze SDBS in catfish. The results of validation of SDBS analysis in cultivated catfish give correlation coefficient 0.9944, sensitivity 10.57 × 104 L mol-1 cm-1, LOD 0.01776 mg/L, LOQ 0.05922 mg/L, precision 0.1351-1.300 %, and accuracy 87.64-90.01 %, respectively. The SDBS concentrations in fish increase with the increase in the SDBS concentration in cultivating water. Bioconcentration Factor (BCF) values were inversely proportional to the concentration of SDBS in the cultivating water. The concentrations of SDBS on catfish, tilapia, and carp in traditional markets were 5.719-8.162; 5.180-6.548; and 2.973-5.874 mg/kg, respectively. In general, analysis method of SDBS in catfish by maceration and UV-Vis spectrophotometry with MBAS show a good result and can be used as a routine analysis in fish.
{"title":"ANALISIS NATRIUM DODESILBENZENA SULFONAT DALAM IKAN LELE SECARA MASERASI DAN SPEKTROFOTOMETRI UV-VIS MENGGUNAKAN METILEN BIRU","authors":"Kahar Muzakar, Adhitasari Suratman, R. Roto","doi":"10.26418/indonesian.v3i3.44150","DOIUrl":"https://doi.org/10.26418/indonesian.v3i3.44150","url":null,"abstract":"Method validation of sodium dodecylbenzene sulfonate (SDBS) analysis in catfish by maceration and UV-Vis spectrophotometry using methylene blue active substances (MBAS) method was performed. The first stage of this research was method validation comprising correlation coefficient, sensitivity, Limit of Detection (LOD), Limit of Quantitation (LOQ), precision, and accuracy. The extraction of SDBS by maceration with methanol for 16 h and analysis by UV-Vis spectrophotometry using MBAS were performed. Then, this method was applied to analyze SDBS in catfish. The results of validation of SDBS analysis in cultivated catfish give correlation coefficient 0.9944, sensitivity 10.57 × 104 L mol-1 cm-1, LOD 0.01776 mg/L, LOQ 0.05922 mg/L, precision 0.1351-1.300 %, and accuracy 87.64-90.01 %, respectively. The SDBS concentrations in fish increase with the increase in the SDBS concentration in cultivating water. Bioconcentration Factor (BCF) values were inversely proportional to the concentration of SDBS in the cultivating water. The concentrations of SDBS on catfish, tilapia, and carp in traditional markets were 5.719-8.162; 5.180-6.548; and 2.973-5.874 mg/kg, respectively. In general, analysis method of SDBS in catfish by maceration and UV-Vis spectrophotometry with MBAS show a good result and can be used as a routine analysis in fish.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89484534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.26418/indonesian.v3i1.46519
Ari Widiyantoro, Harlia Harlia
Cosmos caudatus Kunth is a vegetable plant that is often used as a food ingredient and traditional medicine. This study aims to determine the antioxidant activity of C. caudatus Kunth leaves extract obtained by a variety of extraction methods. The antioxidant activity test was carried out using the DPPH method. The results showed that the yield of C. caudatus Kunth leaves extract by maceration method (10.98%) was higher than the percolation (7.28%) and soxhletation (8.22%). The antioxidant activity (IC50) of the macerated extract (12.5 ± 0.3 µg/mL) was also higher than the percolated extract (16.8 ± 0.2 µg/mL) and soxhletation (18.8 ± 0.2 µg/mL). The macerated extract showed the highest antioxidant activity because it contained many secondary metabolites such as flavonoids and phenolics.
{"title":"AKTIVITAS ANTIOKSIDAN EKSTRAK DAUN KENIKIR (Cosmos caudatus Kunth) DENGAN BERBAGAI METODE EKSTRAKSI (ANTIOXIDANT ACTIVITY OF LEAVES EXTRACT OF KENIKIR (Cosmos caudatus Kunth) WITH VARIOUS EXTRACTION METHODS)","authors":"Ari Widiyantoro, Harlia Harlia","doi":"10.26418/indonesian.v3i1.46519","DOIUrl":"https://doi.org/10.26418/indonesian.v3i1.46519","url":null,"abstract":"Cosmos caudatus Kunth is a vegetable plant that is often used as a food ingredient and traditional medicine. This study aims to determine the antioxidant activity of C. caudatus Kunth leaves extract obtained by a variety of extraction methods. The antioxidant activity test was carried out using the DPPH method. The results showed that the yield of C. caudatus Kunth leaves extract by maceration method (10.98%) was higher than the percolation (7.28%) and soxhletation (8.22%). The antioxidant activity (IC50) of the macerated extract (12.5 ± 0.3 µg/mL) was also higher than the percolated extract (16.8 ± 0.2 µg/mL) and soxhletation (18.8 ± 0.2 µg/mL). The macerated extract showed the highest antioxidant activity because it contained many secondary metabolites such as flavonoids and phenolics.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77004636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.26418/indonesian.v4i1.44761
Nita Wahyu Pratama, M. Sofiana, A. B. Aritonang
Coconut shell liquid smoke has been made from coconut shells by pyrolysis method at a temperature of 150 °C for 4 hours. Liquid smoke purified by adsorption using activated charcoal. The test results showed that activated charcoal could bring down the conciseness to become odourless and the color of liquid smoke from dark chocolate to yellowish-brown. The composition of the liquid smoke compound was determined by using the Gas Chromatography-Mass Spectrophotometer (GC-MS) consisting of 33.60% methylamine-D2 and 31.14% acetic acid as the dominant compounds. A solution of liquid smoke in water (6.0% v / v) was used for activity testing to the content of proximate by immersing fresh anchovy at room temperature with closed conditions for seven days. The results of the proximate test observed as follows: the water content tended to decrease, the highest on day 1 (11.56%) and the lowest on the 7th day (7.38%), the ash content tends to increase, the highest on the 7th day (9, 76%) and the lowest on the 1st day (6.52%), the fat content tends to increase, the highest on the 7th day (20.19%) and the lowest on the 1st day (9.72%) and the protein content is an increase, namely the highest on the 7th day (14.02%) and the lowest on the 1st day (10.20%). The water content decrease caused the ash content was increased as an indication of an enhancement in mineral content in the anchovy sample. Likewise, the water content decrease caused the higher fat content. Based on the results, it can be concluded that the liquid smoke produced from coconut shells purified by the activated charcoal is very promising as a foodstuffs preservative.
以椰子壳为原料，在150℃的温度下热解4小时制得椰壳液烟。用活性炭吸附净化液体烟气。实验结果表明，活性炭可以使烟液的颜色由黑巧克力变为黄褐色，使烟液的颜色变得无味。采用气相色谱-质谱联用仪(GC-MS)测定了液体烟化合物的组成，主要成分为33.60%的甲胺- d2和31.14%的乙酸。采用液态烟水溶液(6.0% v / v)在室温封闭条件下浸泡新鲜凤尾鱼7天，测定其活性。近似试验的结果如下:往往降低,含水量最高的第一天在第7天(11.56%)和最低(7.38%),灰分含量会增加,最高的7天(9 76%)和最低(6.52%),第一天的脂肪含量会增加,在第7天最高(20.19%),最低的第一天(9.72%)和蛋白质含量增加,即在第7天最高(14.02%),第一天最低(10.20%)。水含量的降低导致灰分含量的增加，表明凤尾鱼样品中矿物质含量的增加。同样，水分含量的减少导致脂肪含量的增加。综上所述，活性炭净化后的椰壳液烟是一种很有前途的食品防腐剂。
{"title":"KARAKTERISASI DAN UJI AKTIVITAS ASAP CAIR TERHADAP KANDUNGAN PROKSIMAT IKAN TERI (CHARACTERIZATION AND ACTIVITY OF LIQUID SMOKE ON PROXIMATE CONTENTS OF ACHOVY FISH)","authors":"Nita Wahyu Pratama, M. Sofiana, A. B. Aritonang","doi":"10.26418/indonesian.v4i1.44761","DOIUrl":"https://doi.org/10.26418/indonesian.v4i1.44761","url":null,"abstract":"Coconut shell liquid smoke has been made from coconut shells by pyrolysis method at a temperature of 150 °C for 4 hours. Liquid smoke purified by adsorption using activated charcoal. The test results showed that activated charcoal could bring down the conciseness to become odourless and the color of liquid smoke from dark chocolate to yellowish-brown. The composition of the liquid smoke compound was determined by using the Gas Chromatography-Mass Spectrophotometer (GC-MS) consisting of 33.60% methylamine-D2 and 31.14% acetic acid as the dominant compounds. A solution of liquid smoke in water (6.0% v / v) was used for activity testing to the content of proximate by immersing fresh anchovy at room temperature with closed conditions for seven days. The results of the proximate test observed as follows: the water content tended to decrease, the highest on day 1 (11.56%) and the lowest on the 7th day (7.38%), the ash content tends to increase, the highest on the 7th day (9, 76%) and the lowest on the 1st day (6.52%), the fat content tends to increase, the highest on the 7th day (20.19%) and the lowest on the 1st day (9.72%) and the protein content is an increase, namely the highest on the 7th day (14.02%) and the lowest on the 1st day (10.20%). The water content decrease caused the ash content was increased as an indication of an enhancement in mineral content in the anchovy sample. Likewise, the water content decrease caused the higher fat content. Based on the results, it can be concluded that the liquid smoke produced from coconut shells purified by the activated charcoal is very promising as a foodstuffs preservative.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91511198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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