Using SNIF-NMR method to identify the adulteration of molasses spirit vinegar by synthetic acetic acid in rice vinegar

•Synthetic acetic acid is widely used in adulterate fermented products.•Identification of the spirit vinegar and synthetic acetic acid in rice vinegar was very important.•SINF-NMR method was an effective way to determine the adulterate vinegar. Vinegar is one of the most commonly used sauces in Asia...

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Bibliographic Details
Published in:Industrial crops and products 2013-10, Vol.50, p.904-908
Main Authors: Hsieh, Chang-Wei, Li, Po-Hsien, Cheng, Ju-Yun, Ma, Jung-Tsun
Format: Article
Language:English
Subjects:
acetic acid
adulterated products
Adulteration
molasses
rice
Rice vinegar
sauces
SNIF-NMR
vinegars
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Summary:•Synthetic acetic acid is widely used in adulterate fermented products.•Identification of the spirit vinegar and synthetic acetic acid in rice vinegar was very important.•SINF-NMR method was an effective way to determine the adulterate vinegar. Vinegar is one of the most commonly used sauces in Asia. However, cheap synthetic acetic acid or molasses spirit vinegar is widely used to adulterate pure fermented products. The aim of this study was to identify and evaluate pure rice vinegar by three model of rice vinegar authentication test. According to the analysis of SNIF-NMR method, the (D/H)CH3 values for rice vinegar, molasses spirit vinegar, and synthetic vinegar are 98.50, 108.46 and 131.58ppm. The results of (D/H)CH3 showed that there are significant differences for different materials (p0.97). According to these results, we consider the SNIF-NMR method to be an effective way of determining the degree of adulteration in fermented rice vinegar.
ISSN:0926-6690
1872-633X
DOI:10.1016/j.indcrop.2013.08.014