{"title":"Concentration dependence of the relative error in diffuse reflectance infrared spectrometry","authors":"Z. Krivácsy, J. Hlavay","doi":"10.1016/0584-8539(93)E0031-Q","DOIUrl":null,"url":null,"abstract":"<div><p>A mathematical model between the relative error in the Kubelka—Munk (K—M) function and the sample concentration has been determined if the K—M function is linear with the sample concentration, <em>c</em>≤ w/w%. The theoretical model has been investigated by measuring 3–5 parallels at different sample concentrations and calculating the RSD for the selected absorption bands. Quartz (<em>d</em><sub>ave</sub> = 1.3 μm) and calcite (<em>d</em><sub>ave</sub> = 3.3 μm) as analytes and KBr (<em>d</em><sub>ave</sub> = 9.9 μm) as embedding material were used. The result of the model and the experiments were in a good agreement. It has been shown that the RSD for absorption bands with small sensitivity can increase up to ±20–60%. The precision of the quantitative analysis in diffuse reflectance infrared Fourier transform spectrometry (DRIFTS) can be improved by applying more sensitive absorption bands and parallel measurements at one standard concentration</p></div>","PeriodicalId":82782,"journal":{"name":"Spectrochimica acta. Part A: Molecular spectroscopy","volume":"50 13","pages":"Pages 2197-2202"},"PeriodicalIF":0.0000,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0584-8539(93)E0031-Q","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Spectrochimica acta. Part A: Molecular spectroscopy","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0584853993E0031Q","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
A mathematical model between the relative error in the Kubelka—Munk (K—M) function and the sample concentration has been determined if the K—M function is linear with the sample concentration, c≤ w/w%. The theoretical model has been investigated by measuring 3–5 parallels at different sample concentrations and calculating the RSD for the selected absorption bands. Quartz (dave = 1.3 μm) and calcite (dave = 3.3 μm) as analytes and KBr (dave = 9.9 μm) as embedding material were used. The result of the model and the experiments were in a good agreement. It has been shown that the RSD for absorption bands with small sensitivity can increase up to ±20–60%. The precision of the quantitative analysis in diffuse reflectance infrared Fourier transform spectrometry (DRIFTS) can be improved by applying more sensitive absorption bands and parallel measurements at one standard concentration
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