Loose powder and eyeshadow are cosmetics often used by women in their daily activities. Some cosmetic products contain heavy metal in the composition. This study aims to determine the concentration of lead in the loose powder and eyeshadow both registered and unregistered at the Food and Drug Supervisory Agency (BPOM) in Malang. The destruction method used is wet digestion in the opened and closed systems with variations of oxidizing agents of HNO3 and HClO4. The concentration of lead was analyzed using atomic absorption spectroscopy (AAS). The results of destruction optimization on loose powder and eyeshadow showed wet digestion in closed system gave the best destruction results. The best oxidizing agent for both products is a mixture of HNO3: HClO4 (2: 1). Lead concentration in the loose powder product for samples A, B, C, D was 18.90±0.35, 19.10±0.46, 23.47±0.65 and 28.90±0.35mg/Kg, respectively. Eyeshadow samples of E, F, G, and H contained lead concentrations were 25.67±1.76, 34.23±0.57, 45.30±0.56 and 45.90±1.78 mg/Kg, respectively
Keywords: cosmetics, loose powder, eyeshadow, lead
Bedak tabur dan eyeshadow merupakan kosmetik yang sering digunakan oleh wanita dalam kehidupaan sehari-hari. Beberapa produk kosmetik mengandung logam berat dalam komposisinya. Penelitian ini bertujuan untuk menentukan kadar timbal pada bedak tabur dan eyeshadow baik yang terdaftar dan tidak terdaftar di Badan Pengawas Obat dan Makanan (BPOM) di kota Malang. Metode yang digunakan adalah metode destruksi basah (terbuka dan tertutup) dengan variasi zat pengoksidasi HNO3 dan HClO4. Kadar timbal dianalisis menggunakan spektroskopi serapan atom (SSA). Hasil optimasi desktruksi pada bedak tabur dan eyeshadow menunjukkan bahwa destruksi basah tertutup memberikan hasil destruksi terbaik. Adapun pengoksidasi terbaik untuk kedua produk tersebut adalah campuran HNO3:HClO4 (2:1). Kadar timbal bedak tabur pada sampel A, B, C, D masing-masing sebesar 18,90±0,35; 19,10±0,46; 23,47±0,65 dan 28,90±0,35 mg/Kg. Sampel eyeshadow E, F, G, dan H mengandung kadar timbal sebesar 25,67±1,76; 34,23±0,57; 45,30±0,56 dan 45,90±1,78 mg/Kg, berturut-turut.
Kata kunci: kosmetik, bedak tabur, eyeshadow, timbal
Titanium dioxide (TiO2) is supported into natural zeolite to enhance its photocatalytic activity. TiO2/zeolite is synthesized using sol-gel method at composition ratio of 5:95; 10:90; 20:80 and 30:70%. Structural properties are measured by X-ray diffraction showed TiO2/zeolite in various composition has characteristic of anatase and modernite phase. The energy dispersive spectroscopy characterization shows TiO2/zeolite containing Ti element which indicates that TiO2is successfully supported into natural zeolite. Vibration mode of Infrared and Raman spectra tend shifted to higher wavenumber as increasing of TiO2 content indicating the higher energy vibration due to molecular interaction between TiO2 and zeolite. Photocatalytic activity test toward methylene blue degradation shows that TiO2/zeolite has higher activity than TiO2 and zeolite itself.
Keywords: Photocatalyst, titanium dioxide, zeolite
Hydrilla verticillata is one of water plants that has some bioactivities. The presence of secondary metabolites in H. verticillata is responsible for the bioactivity. The purpose of this study was to determine and separate bioactive compounds from fraction of petroleum ether (PE) and ethyl acetate (EA) as a result of hydrolysis of H. verticillata ethanol extract. H. verticillata was extracted by maceration method using ethanol solvent, hydrolyzed with hydrochloric acid and partitioned respectively with petroleum ether and ethyl acetate. Crude ethanol extract, PE and EA fraction were identified their secondary metabolites. The phytochemical test results showed H. verticillata ethanol extract containing alkaloid compounds, flavonoids, tannins, saponins, triterpenoids, and steroids. PE fraction contained steroids and terpenoids, while EA fraction contained flavonoids, steroids, and triterpenoids. Analytical thin layer chromatography analysis showed n-hexane : ethyl acetate (4: 1) eluent as the best mobile phase for separating steroids. The preparative thin layer chromatography analysis of H. verticillata fraction using n-hexane : ethyl acetate (8: 2) as mobile phase resulted in 17 and 14 spots of PE and EA fractions, respectively.
Keywords: Hydrilla verticillata, thin layer chromatography, phytochemicals
Hydrilla verticillata merupakan salah satu tanaman air yang banyak memiliki bioaktivitas. Adanya metabolit sekunder pada H. verticillata yang bertanggung jawab terhadap bioaktivitas ini. Tujuan penelitian ini adalah untuk mengetahui dan memisahkan senyawa aktif dari fraksi petroleum eter (PE) dan etil asetat (EA) hasil hidrolisis ekstrak etanol H. verticillata. Ekstrak diperoleh dengan metode maserasi menggunakan pelarut etanol, dihidrolisis dengan asam klorida dan dipartisi masing-masing dengan petroleum eter dan etil asetat. Ekstrak kasar etanol, fraksi PE dan EA diuji kandungan metabolit sekundernya. Hasil uji fitokimia menunjukkan ekstrak etanolH. verticillata mengandung senyawa alkaloid, flavonoid, tanin, saponin, triterpenoid, dan steroid. Fraksi PE mengandung steroid dan terpenoid, sedangkan fraksi EA mengandung flavonoid, steroid, dan triterpenoid. Hasil analisis KLTA menunjukkan eluen n-heksana : etil asetat (4:1) sebagai fasa gerak terbaik untuk memisahkan steroid.Hasil analisis KLTP fraksi H. verticillatamenggunakan perbandingan fasa gerak n-heksana : etil asetat (8:2) menghasilkan spot fraksi PE dan EA berturut-turut sebanyak 17 dan 14 spot.
Kata Kunci: Hydrilla verticillata, kromatografi lapis tipis, uji fitokimia