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Accurate Measurement of Total Arsenic in Rice and Oyster by Considering Arsenic Species
Author(s) -
Lee Won Bae,
Lee Seon Hwa,
Lee Yonghoon,
Nam Sang Ho
Publication year - 2019
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.11889
Subject(s) - arsenobetaine , arsenic , oyster , chemistry , environmental chemistry , matrix (chemical analysis) , inductively coupled plasma mass spectrometry , arsenite , mass spectrometry , chromatography , fishery , biology , organic chemistry
Toxicity due to arsenic (As) in food has been mostly assessed by the determination of total As amount. Although the toxicity depends on the chemical forms, the sample can be determined to be safe if the total As concentration is less than the maximum allowable amounts of the toxic arsenic compounds. In this work, the accuracy of total As analysis for rice and oyster samples was significantly influenced by the matrix effect and the chemical forms. The matrix effect could be effectively corrected by employing the appropriate internal standard, tellurium. The As species such as As(V), As(III), monomethylarsonic acid, dimethylarsinic acid, and arsenobetaine showed significantly different sensitivities in the inductively coupled plasma mass spectrometry analysis for rice and oyster samples. This indicates that the total As determined without any information of the chemical species and matching sensitivities of samples and standards may be inaccurate.