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First observation of domoic acid and its isomers in shellfish samples from Shandong Province, China

文献类型： 外文期刊

作者： Zheng, Guanchao 1 ; Wu, Haiyan 1 ; Guo, Mengmeng 1 ; Peng, Jixing 1 ; Zhai, Yuxiu 1 ; Tan, Zhijun 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Key Lab Testing & Evaluat Aquat Prod Safety & Qua, Minist Agr & Rural Affairs, Qingdao 266071, Peoples R China

2.Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao 266237, Peoples R China

3.Dalian Polytech Univ, Collaborat Innovat Ctr Seafood Deep Proc, Dalian 116034, Peoples R China

关键词： domoic acid; shellfish; liquid chromatography-tandem mass spectrometry (LC-MS; MS); Shandong Province

期刊名称：JOURNAL OF OCEANOLOGY AND LIMNOLOGY （ 影响因子：1.554； 五年影响因子：1.448 ）

ISSN： 2096-5508

年卷期：

页码：

收录情况： SCI

摘要： A total of 133 shellfish samples were collected in seven cities of Shandong Province, China, from May to October, 2019. The domoic acid (DA) concentrations were determined by liquid chromatography-tandem mass spectrometry (LC-MS/MS), and their distribution characteristics were investigated. DA concentration was detected high in over 1/3 (36.1%) of the samples of four kinds of shellfish in all three seasons in range from 0 to 102 mu g/kg. The highest DA concentrations were 102, 101, 36.7, and 10.2 mu g/kg in Crassostrea gigas, Chlamys farreri, Mactra veneriformis, and Mytilus edulis, respectively. Geographically, Yantai (22.0 mu g/kg) and Weihai (16.9 mu g/kg) showed relatively high concentrations of DA, whereas Rizhao and Dongying presented only 0.85- and 1.76-mu g/kg DA, respectively. DA concentrations in the shellfish samples were strongly related to seasonal changes, being significantly higher in autumn and summer than that in spring. The DA risk exposure assessments indicate that dietary seafood consumption did not pose a health threat to general human population. In addition, three isomers (isoA, isoD, isoE) and 5 '-epimer DA were detected in 3.00%-15.80% of the shellfish samples. This study is the first to observe DA and its isomers in shellfish samples of Shandong Province. The results demonstrate that DA contamination is very common and should be continuously monitored.

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