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Article
Affiliation(s)

1. Nuclear Engineering Department, Federal University of Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil
2. European Research Institute on Natural Ingredients (ERINI), Grasse 06131, France

ABSTRACT

Tartaric acid is naturally obtained from many fruits, principally grapes. Several tartaric acid derivatives are commercialized, especially salts and esters. They are usually applied in food, pharmaceutical and viniculture industry. The rise in production of synthetic tartaric acid has increased the production of synthetic derivatives consequently. Potassium bitartrate (KHT), also known as cream of tartar, is an important derivative used in food and pharmaceutical industries. At the moment there is no specific regulation for identification and characterization of synthetic tartaric acid derivatives, it is exclusive for naturals. In this study isotope ratio mass spectrometry (IRMS) was applied in order to discriminate KHT production method and geographical origin. The measurements of δ2H, δ13C and δ18O were performed by isotope-ratio mass spectrometry. A clear differentiation between synthetic and natural samples is observed. However, the same was not observed for classification regarding geographical origin. This is a promising technique that combined with a larger database that could be applied in quality control of KHT.

KEYWORDS

Tartaric acid derivatives, multi-isotope analysis, KHT, isotopic mass spectrometry.

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