{"title":"Comparison of infrared and mass-spectrometric measurements of carbon-13/carbon-12 ratios","authors":"William W. Wong","doi":"10.1016/0020-708X(85)90266-2","DOIUrl":null,"url":null,"abstract":"<div><p>The δ<sup>13</sup>C values of 20 breath samples and 10 tank-CO<sub>2</sub> samples (δ<sup>13</sup>C values ranged from −31.3 to +148.9% vs PDB) and the CO<sub>2</sub> concentrations of three breath samples and 10 tank-CO<sub>2</sub> samples were measured with a commercial prototype of a diode-laser i.r. spectrophotometer, MAT I. The results were compared with those obtained by gas-isotope-ratio mass spectrometry and by gas chromatography. Precisions (<em>s</em><sub>x</sub>, <em>n</em> = 10) of 0.2% and 0.6% were calculated for <sup>13</sup>C/<sup>12</sup>C ratios and CO<sub>2</sub> concentrations, respectively, using the MAT I system.</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 12","pages":"Pages 997-999"},"PeriodicalIF":0.0000,"publicationDate":"1985-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90266-2","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The International journal of applied radiation and isotopes","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0020708X85902662","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 10
Abstract
The δ13C values of 20 breath samples and 10 tank-CO2 samples (δ13C values ranged from −31.3 to +148.9% vs PDB) and the CO2 concentrations of three breath samples and 10 tank-CO2 samples were measured with a commercial prototype of a diode-laser i.r. spectrophotometer, MAT I. The results were compared with those obtained by gas-isotope-ratio mass spectrometry and by gas chromatography. Precisions (sx, n = 10) of 0.2% and 0.6% were calculated for 13C/12C ratios and CO2 concentrations, respectively, using the MAT I system.
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