Yao L, Maloley K, Broeckling C, Ensley S, Crain S, Coffey R. Quantitative Analysis of Ethyl Carbamate in
Distillers Grains Co-products and Bovine Plasma by Gas Chromatography-Mass Spectrometry.
J Agric Food Chem 2020;
68:10984-10991. [PMID:
32833443 DOI:
10.1021/acs.jafc.0c03535]
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Abstract
Ethyl carbamate (EC) is a fermentation byproduct in foods and beverages and classified as a Group 2A probable human carcinogen. Each year, greater than 40 million metric tons of fermentation co-products from the U.S. ethanol industry are fed to food animals. A gas chromatography-mass spectrometry assay was developed to quantify EC extracted from various distillers grains co-products with a limit of detection at 0.7 ng/g (on an as-fed basis). EC was detected in all the distillers grains co-products surveyed in this study. Corn condensed distillers solubles contained the highest concentration of EC, ranging from 1618 to 2956 ng/g. Concentrations of EC in other types of distillers grains co-products varied from 17 to 917 ng/g. Cattle fed distillers grains co-products that constituted 19-38% of the total feed (as-fed) were found to contain 2-3 ng/mL of EC in blood plasma. No EC was detected in blood plasma from grass-fed control cattle.
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