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. 3, No. 2 ( 2020-06-15), p. 71-79
Abstract:
A highly sensitive and specific method for simultaneous determination of six synthetic auxins (4-chlorophenoxyacetic acid (4-CPA), 2-methyl-4-chlorophenoxyacetic acid (MCPA), 1-naphthalene acetic acid (NAA), 2-napthoxyacetic acid (NOA), indole-3-propionic acid (IPA), indole-3-butyric acid (IBA)) were developed using a QuEChERS-based sample extraction followed by an LC-MS/MS analysis. The method was validated and proved as meeting the AOAC International requirements for specificity, sensitivity, and accuracy in the range of 3 and 200 & micro;g/kg. LOD and LOQ of all analytes were at 1 & micro;g/kg and 3 & micro;g/kg, respectively. The recoveries of six synthetic auxins were from 78.9% to 96.4% and the repeatability relative standard deviations were below 12.6%. The method was applied to simultaneously determine the content of 4-CPA, MCPA, NAA, NOA, IPA, IBA in vegetables, tubers, and fruits samples collected from different markets in Hanoi (Mai Dich, Dan Phuong, Giap Bat, Bach Mai, and Nga Tu So). MCPA was detected in 22/30 vegetable samples (3.0 & divide; 7.1 & micro;g/kg), 9/30 tuber samples (3.2 & divide; 3.7 & micro;g/kg); 4-CPA was detected in bean sprouts in the range from 23 to 75 & micro;g/kg which exceeded the Maximum Residue Levels (MRL) of 10 & micro;g/kg set by European Commission.
Type of Medium:
Online Resource
ISSN:
2615-9252
DOI:
10.47866/2615-9252/vjfc.110
Language:
Unknown
Publisher:
Vietnamese Journal of Food Control, National Institute for Food Control
Publication Date:
2020
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