Journal of Chemical Metrology最新文献_第2页

Accuracy of quantitative NMR analysis: a case study of lignin 定量核磁共振分析的准确性:以木质素为例

Journal of Chemical Metrology Pub Date : 2023-06-29 DOI: 10.25135/jcm.88.2304.2753

Shrikant Shivaji Pawade, Ivo Leito, Koit Herodes, Lauri Toom

引用次数: 0

Certification of buffer solutions reference materials using Baucke cell for supporting the quality of pH measurements 使用Baucke电池支持pH测量质量的缓冲溶液标准物质的认证

Journal of Chemical Metrology Pub Date : 2023-06-29 DOI: 10.25135/jcm.87.2303.2773

Adel Shehata, Abdulrahman R. Alaskar, Rashed A. Aldosari, Fahad R. Almutairi

引用次数: 0

Development of a stability-indicating HPLC method for Lasmiditan and its process related impurities with characterization of degradation products by LCMS/MS 拉西米坦及其工艺相关杂质的稳定性指示HPLC方法的建立及其降解产物的LCMS/MS表征

IF 1.3

Journal of Chemical Metrology Pub Date : 2023-06-29 DOI: 10.25135/jcm.89.2304.2767

Venkateswara Rao Anna, Chilakabattina Naga Narasimha Babu, Bhagya Kumar Tatavarti, N. Vijaya, Cherukula Srinivasa Reddy

引用次数: 1

Determination of adulteration in hair serums by LC-HRMS § LC-HRMS法测定头发血清中的掺假

IF 1.3

Journal of Chemical Metrology Pub Date : 2023-06-29 DOI: 10.25135/jcm.90.2304.2599

A. Gören, T. Akalin, S. Yalçin, Aysenur Gunaydin Akyildiz

引用次数: 0

Chemometrics assisted UV-spectrophotometric method for simultaneous estimation of aliskiren and hydrochlorothiazide in bulk and their pharmaceutical dosage form 化学计学辅助紫外分光光度法同时测定散装阿利吉仑和氢氯噻嗪及其剂型

IF 1.3

Journal of Chemical Metrology Pub Date : 2023-06-29 DOI: 10.25135/rnp.84.2212.2661

Shantilal Padhiyar, Kamlesh M Jivani, J. Upadhyay, Tejas Patel, V. Bhavsar, B. Suhagia

引用次数: 0

Certification of buffer solutions reference materials using Baucke cell for supporting the quality of pH measurements 使用Baucke池支持pH测量质量的缓冲溶液参考材料的认证

IF 1.3

Journal of Chemical Metrology Pub Date : 2023-05-19 DOI: 10.25135/rnp.87.2303.2773

A. Shehata, A. R. Alaskar, Rashed A. Aldosari, F. Almutairi

{"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}

引用次数: 0

Application of the localized surface plasmon resonance of silver nanoparticles for the determination of ethion in water samples 银纳米粒子的局域表面等离子体共振在测定水样中乙硫醇中的应用

IF 1.3

Journal of Chemical Metrology Pub Date : 2023-04-30 DOI: 10.25135/jcm.86.2303.2728

S. H. Ahmadi, H. Daneshyar, N. Dalali

引用次数: 0

1H NMR spectroscopy-based serum metabolomics analysis of iron deficiency anemia 基于1H核磁共振波谱的缺铁性贫血血清代谢组学分析

IF 1.3

Journal of Chemical Metrology Pub Date : 2023-04-28 DOI: 10.25135/jcm.85.2303.2727

M. Demirel, Ayşe Zehra Gül, Fatmanur Köktaşoğlu, Halime Ağaç, A. Gören, C. Karatoprak, Ş. Selek

引用次数: 0

DNA quantification via nanodrop spectrophotometer: estimation of method uncertainty using DNA from standard reference materials, sprague dawley rats, and humans 通过纳米滴分光光度计进行DNA定量:使用标准参比物质、大鼠和人的DNA进行方法不确定度的估计

IF 1.3

Journal of Chemical Metrology Pub Date : 2023-04-04 DOI: 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

引用次数: 0

Assessment of uncertainty estimation for measurement of ethanol concentration in COVID-19 hand sanitizer using FTIR spectroscopy FTIR光谱法测定COVID-19洗手液中乙醇浓度的不确定度评定

IF 1.3

Journal of Chemical Metrology Pub Date : 2023-03-10 DOI: 10.25135/jcm.81.2210.2611

P. Khaenamkaew, Chailoek Tanghengjaroen, Dhonluck Manop, Worasit Palkawong Na Ayuthaya, Krirk Wongsontam, Narudom Nualkhow

{"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}

引用次数: 0