Pub Date : 2023-06-29DOI: 10.25135/jcm.88.2304.2753
Shrikant Shivaji Pawade, Ivo Leito, Koit Herodes, Lauri Toom
{"title":"Accuracy of quantitative NMR analysis: a case study of lignin","authors":"Shrikant Shivaji Pawade, Ivo Leito, Koit Herodes, Lauri Toom","doi":"10.25135/jcm.88.2304.2753","DOIUrl":"https://doi.org/10.25135/jcm.88.2304.2753","url":null,"abstract":"","PeriodicalId":15343,"journal":{"name":"Journal of Chemical Metrology","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134999380","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 : 2023-06-29DOI: 10.25135/jcm.87.2303.2773
Adel Shehata, Abdulrahman R. Alaskar, Rashed A. Aldosari, Fahad R. Almutairi
{"title":"Certification of buffer solutions reference materials using Baucke cell for supporting the quality of pH measurements","authors":"Adel Shehata, Abdulrahman R. Alaskar, Rashed A. Aldosari, Fahad R. Almutairi","doi":"10.25135/jcm.87.2303.2773","DOIUrl":"https://doi.org/10.25135/jcm.87.2303.2773","url":null,"abstract":"","PeriodicalId":15343,"journal":{"name":"Journal of Chemical Metrology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134999378","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}
{"title":"Development of a stability-indicating HPLC method for Lasmiditan and its process related impurities with characterization of degradation products by LCMS/MS","authors":"Venkateswara Rao Anna, Chilakabattina Naga Narasimha Babu, Bhagya Kumar Tatavarti, N. Vijaya, Cherukula Srinivasa Reddy","doi":"10.25135/jcm.89.2304.2767","DOIUrl":"https://doi.org/10.25135/jcm.89.2304.2767","url":null,"abstract":"","PeriodicalId":15343,"journal":{"name":"Journal of Chemical Metrology","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45206877","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 : 2023-06-29DOI: 10.25135/jcm.90.2304.2599
A. Gören, T. Akalin, S. Yalçin, Aysenur Gunaydin Akyildiz
{"title":"Determination of adulteration in hair serums by LC-HRMS §","authors":"A. Gören, T. Akalin, S. Yalçin, Aysenur Gunaydin Akyildiz","doi":"10.25135/jcm.90.2304.2599","DOIUrl":"https://doi.org/10.25135/jcm.90.2304.2599","url":null,"abstract":"","PeriodicalId":15343,"journal":{"name":"Journal of Chemical Metrology","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46687070","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 : 2023-06-29DOI: 10.25135/rnp.84.2212.2661
Shantilal Padhiyar, Kamlesh M Jivani, J. Upadhyay, Tejas Patel, V. Bhavsar, B. Suhagia
{"title":"Chemometrics assisted UV-spectrophotometric method for simultaneous estimation of aliskiren and hydrochlorothiazide in bulk and their pharmaceutical dosage form","authors":"Shantilal Padhiyar, Kamlesh M Jivani, J. Upadhyay, Tejas Patel, V. Bhavsar, B. Suhagia","doi":"10.25135/rnp.84.2212.2661","DOIUrl":"https://doi.org/10.25135/rnp.84.2212.2661","url":null,"abstract":"","PeriodicalId":15343,"journal":{"name":"Journal of Chemical Metrology","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45467834","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 : 2023-05-19DOI: 10.25135/rnp.87.2303.2773
A. Shehata, A. R. Alaskar, Rashed A. Aldosari, F. Almutairi
: The need for certified pH reference materials to support the traceability claims and quality of the daily large volume of pH measurements is very strong. In this work, three batches of buffer solutions were prepared, and their pH values were certified in accordance with the IUPAC Recommendation 2002. The first batch was prepared from potassium tetraoxalate (dihydrate) and disodium oxalate to provide pH4 and the second batch was prepared from disodium hydrogen phosphate and potassium dihydrogen phosphate to provide pH7. The third batch was prepared from sodium hydrogen carbonate and sodium carbonate to provide pH10. Every batch was homogenized by mechanical shaking for one night and bottled into 50 HDPE bottles, each is 250 mL. A number of bottles were systematically selected for homogeneity, stability and characterization studies of the buffer reference materials. These studies were carried out in accordance with the requirements of ISO 17034 and ISO Guide 35 using Baucke cell. The pH values 4, 7 and 10 of the secondary buffers were restandardized with regard to the pH values 4, 7 and 10 of the primary buffers produced by the Slovak National Metrology Institute, SMU. The results obtained showed that the produced buffer RMs were homogeneous and stable enough and their certified pH values were found 4.001±0.019, 7.005±0.015 and 10.002±0.023. These CRMs will be very useful as calibrants and as PT samples for analytical laboratories performing pH measurements in various fields.
{"title":"Certification of buffer solutions reference materials using Baucke cell for supporting the quality of pH measurements","authors":"A. Shehata, A. R. Alaskar, Rashed A. Aldosari, F. Almutairi","doi":"10.25135/rnp.87.2303.2773","DOIUrl":"https://doi.org/10.25135/rnp.87.2303.2773","url":null,"abstract":": The need for certified pH reference materials to support the traceability claims and quality of the daily large volume of pH measurements is very strong. In this work, three batches of buffer solutions were prepared, and their pH values were certified in accordance with the IUPAC Recommendation 2002. The first batch was prepared from potassium tetraoxalate (dihydrate) and disodium oxalate to provide pH4 and the second batch was prepared from disodium hydrogen phosphate and potassium dihydrogen phosphate to provide pH7. The third batch was prepared from sodium hydrogen carbonate and sodium carbonate to provide pH10. Every batch was homogenized by mechanical shaking for one night and bottled into 50 HDPE bottles, each is 250 mL. A number of bottles were systematically selected for homogeneity, stability and characterization studies of the buffer reference materials. These studies were carried out in accordance with the requirements of ISO 17034 and ISO Guide 35 using Baucke cell. The pH values 4, 7 and 10 of the secondary buffers were restandardized with regard to the pH values 4, 7 and 10 of the primary buffers produced by the Slovak National Metrology Institute, SMU. The results obtained showed that the produced buffer RMs were homogeneous and stable enough and their certified pH values were found 4.001±0.019, 7.005±0.015 and 10.002±0.023. These CRMs will be very useful as calibrants and as PT samples for analytical laboratories performing pH measurements in various fields.","PeriodicalId":15343,"journal":{"name":"Journal of Chemical Metrology","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41900886","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 : 2023-04-30DOI: 10.25135/jcm.86.2303.2728
S. H. Ahmadi, H. Daneshyar, N. Dalali
{"title":"Application of the localized surface plasmon resonance of silver nanoparticles for the determination of ethion in water samples","authors":"S. H. Ahmadi, H. Daneshyar, N. Dalali","doi":"10.25135/jcm.86.2303.2728","DOIUrl":"https://doi.org/10.25135/jcm.86.2303.2728","url":null,"abstract":"","PeriodicalId":15343,"journal":{"name":"Journal of Chemical Metrology","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43902609","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 : 2023-04-28DOI: 10.25135/jcm.85.2303.2727
M. Demirel, Ayşe Zehra Gül, Fatmanur Köktaşoğlu, Halime Ağaç, A. Gören, C. Karatoprak, Ş. Selek
{"title":"1H NMR spectroscopy-based serum metabolomics analysis of iron deficiency anemia","authors":"M. Demirel, Ayşe Zehra Gül, Fatmanur Köktaşoğlu, Halime Ağaç, A. Gören, C. Karatoprak, Ş. Selek","doi":"10.25135/jcm.85.2303.2727","DOIUrl":"https://doi.org/10.25135/jcm.85.2303.2727","url":null,"abstract":"","PeriodicalId":15343,"journal":{"name":"Journal of Chemical Metrology","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44057719","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 : 2023-04-04DOI: 10.25135/jcm.83.2301.2676
Alejandro M García Alegría, I. Anduro-Corona, C. J. Pérez-Martínez, Trinidad Quizán-Plata, L. Armenta-Villegas, M. L. Rascón-Durán, H. Astiazarán-García
{"title":"DNA quantification via nanodrop spectrophotometer: estimation of method uncertainty using DNA from standard reference materials, sprague dawley rats, and humans","authors":"Alejandro M García Alegría, I. Anduro-Corona, C. J. Pérez-Martínez, Trinidad Quizán-Plata, L. Armenta-Villegas, M. L. Rascón-Durán, H. Astiazarán-García","doi":"10.25135/jcm.83.2301.2676","DOIUrl":"https://doi.org/10.25135/jcm.83.2301.2676","url":null,"abstract":"","PeriodicalId":15343,"journal":{"name":"Journal of Chemical Metrology","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46961578","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 : 2023-03-10DOI: 10.25135/jcm.81.2210.2611
P. Khaenamkaew, Chailoek Tanghengjaroen, Dhonluck Manop, Worasit Palkawong Na Ayuthaya, Krirk Wongsontam, Narudom Nualkhow
Analysis of uncertainty estimation for measurement of type and concentration of alcohol in hand sanitisers is a matter of urgency in the COVID-19 situation. FTIR spectroscopy was used to investigate hand sanitisers made in our laboratory and commercial products. An internal standard addition method was used to control the measurement quality. The absorption spectra of ethanol were found to be at 1086 and 1044 cm-1, corresponding to C-O stretching. The area under the C-O adsorptions is used to create a calibration curve, which is then used to calculate the ethanol percentage. Additional standard sample and quality control sample showed calibration curves with slopes of 0.1267 and 0.1285, respectively. The regression coefficients and residual variance of 0.0057 showed a 'best fit' with the predicted value. These parameters were used to estimate the uncertainty of six commercial products. The ethanol concentration of commercial products is measured between 71.38 and 81.54% v/v, with an estimated uncertainty of 1.14% v/v. The results showed that the ethanol content of all products differed from the label but could be used to kill bacteria and viruses. This entire process was established as a SOP for measuring alcohol concentration in hand sanitizer.
{"title":"Assessment of uncertainty estimation for measurement of ethanol concentration in COVID-19 hand sanitizer using FTIR spectroscopy","authors":"P. Khaenamkaew, Chailoek Tanghengjaroen, Dhonluck Manop, Worasit Palkawong Na Ayuthaya, Krirk Wongsontam, Narudom Nualkhow","doi":"10.25135/jcm.81.2210.2611","DOIUrl":"https://doi.org/10.25135/jcm.81.2210.2611","url":null,"abstract":"Analysis of uncertainty estimation for measurement of type and concentration of alcohol in hand sanitisers is a matter of urgency in the COVID-19 situation. FTIR spectroscopy was used to investigate hand sanitisers made in our laboratory and commercial products. An internal standard addition method was used to control the measurement quality. The absorption spectra of ethanol were found to be at 1086 and 1044 cm-1, corresponding to C-O stretching. The area under the C-O adsorptions is used to create a calibration curve, which is then used to calculate the ethanol percentage. Additional standard sample and quality control sample showed calibration curves with slopes of 0.1267 and 0.1285, respectively. The regression coefficients and residual variance of 0.0057 showed a 'best fit' with the predicted value. These parameters were used to estimate the uncertainty of six commercial products. The ethanol concentration of commercial products is measured between 71.38 and 81.54% v/v, with an estimated uncertainty of 1.14% v/v. The results showed that the ethanol content of all products differed from the label but could be used to kill bacteria and viruses. This entire process was established as a SOP for measuring alcohol concentration in hand sanitizer.","PeriodicalId":15343,"journal":{"name":"Journal of Chemical Metrology","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43791750","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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