In:
Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam, Vietnamese Journal of Food Control, National Institute for Food Control, Vol. 2, No. 3 ( 2019-09-27), p. 67-73
Abstract:
The food contaminants including 3-chloro-1,2-propanediol (3-MCPD) and 3-MCPD fatty acid esters have been a matter of great concern in the past few years due to their toxicity and their occurrence in numerous foods. Recently, significant amounts of the isomeric compounds 2-chloro-1,3-propanediol (2-MCPD) fatty acid esters have been detected in refined oil samples. Gas Chromatography (GC) coupled with mass spectroscopy (MS) was used for the quantification of fatty acid esters of 2-Chloro-1,3-propandiol (2-MCPD), 3-Chloro-1,2- propandiol (3-MCPD) and glycidol in oil. Internal standards including 3-MCPD-ester-d5 (rac 1,2-bis-palmitoyl-3-chloropropanediol-d5), 2-MCPD-ester-d5 (1,3-Distearoyl-2- chloropropanediol-d5) and Glycidyl sterate-d5 were added to samples. Spiked samples were, then, incubated in NaBr/H2SO4 and H2SO4/MeOH solutions. They were, eventually, extracted with ethyl acetate and n-hexane solvents in order to convert Glycidyl esters to free MCPD and glycidol in samples before using phenylboronic acid derivative. The limit of quantitation was of 0.1 ppm (mg/kg). The recoveries at the concentration of 0.1 mg/kg ranged from 80 to 120% and the repeatability and reproducibility were less than 10%.
Type of Medium:
Online Resource
ISSN:
2615-9252
DOI:
10.47866/2615-9252/vjfc.78
Language:
Unknown
Publisher:
Vietnamese Journal of Food Control, National Institute for Food Control
Publication Date:
2019