The CM–CRDS Method for Measuring the Carbon Isotope Ratio in Vanillin With an Expanded Uncertainty of Less Than 0.1 %

Isotopic analysis is an efficient method for quality control and detection of counterfeit food products. The elemental isotope ratio mass spectrometry (hereinafter referred to as EA-IRMS) traditionally used in the field isotopic products regulated relevant regulatory documents. combustion module-cavity ring-down spectroscopy CM–CRDS) a rapidly developing measuring carbon with number advantages; currently, this most interest However, studies metrological characteristics CM–CRDS part composition vanillin have not been carried out. purpose research was develop procedure by expanded uncertainty (at k = 2) less than 0.1 ‰. development measurement out preparation international key comparison CCQM-K167 «Carbon delta measurements vanillin» (2019–2022) organized Working Group on Isotope Ratios Consultative Committee Amount Substance International Bureau Weights Measures. experimental reference installation, which State primary standard units molar part, concentration components gas condensate environs GET 154-2019. following tasks were solved achieve set goal: factors that form budget identified, some eliminated or minimized preparing equipment samples, performing controlling accuracy, processing results. results comparisons confirmed possibility using developed 0.09 ‰, corresponds best performed EA-IRMS method. achieved result practical importance, because it confirms applying vanillin. Further will be aimed at procedures other substances materials analyzed industry, including safety confirmation juice according TR CU023/2011 alcoholic EAEU047/2018.