Fisheries and aquaculture production in the coastal zone of Vietnam contribute significantly to the national economy. However, seafood quality and safety, especially in terms of metal contents, are of increasing concern, for both domestic and international markets. This paper presents the results of an investigation in some trace metal elements (iron (Fe), zinc (Zn), manganese (Mn), copper (Cu), arsenic (As), cadmium (Cd), and mercury (Hg)) concentrations in some fishes, crustaceans, and molluscs in the coastal zone of the Red River (in the Ba Lat estuary in Thai Binh and Nam Dinh provinces) during four sampling campaigns in 2020. All samples were treated by a green sample preparation using microwave digestion and then analyzed by inductively coupled plasma-mass spectrometry (ICP-MS). The results showed that the trace metal element concentrations in fish, crustacean, and mollusc samples decreased in the following order: Fe > Zn > Mn > Cu > As > Cd ∼ Hg. In more details, the ranges of trace metal elements in seafood samples were 13.13–202.73; 7.63–82.71; 0.48–22.73; 0.72–15.58; 0.18–5.12; 0.001–1.114; and 0.001–0.923 mg·kg⁻¹ for Fe, Zn, Mn, Cu, As, Cd, and Hg, respectively. The research results contribute to the dataset of the seafood (both fishery and aquacultural seafood) quality in the Red River coastal zone. Although the mean values of different trace metal elements observed in this study were lower than the allowed values of Vietnam’s or European’s threshold for food safety, some high concentrations were detected. The survey results suggest the need to expand the monitoring scope (frequency of monitoring, number of samples, and observed variables) for obtaining a fully comprehensive assessment of seafood quality in this region. Our results also indicate that it is necessary to manage water quality in coastal areas, especially where aquaculture activities are carried out.

中文翻译：

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利用绿色样品制备和电感耦合等离子体质谱 (ICP-MS) 分析红河沿岸地区（越南巴叻河口）部分海鲜中的痕量金属元素

越南沿海地区的渔业和水产养殖生产对国民经济做出了重要贡献。然而，海产品的质量和安全，特别是金属含量，越来越受到国内和国际市场的关注。本文介绍了一些微量金属元素（铁 (Fe)、锌 (Zn)、锰 (Mn)、铜 (Cu)、砷 (As)、镉 (Cd) 和汞 (Hg)）的研究结果2020 年四次采样活动期间，红河沿岸地区（太平省和南定省的巴拉河口）一些鱼类、甲壳类动物和软体动物中的浓度。所有样品均采用微波消解进行绿色样品制备处理然后通过电感耦合等离子体质谱 (ICP-MS) 进行分析。结果表明，鱼类、甲壳类和软体动物样品中微量金属元素浓度依次降低：Fe > Zn > Mn > Cu > As > Cd ∼ Hg。更详细地说，海鲜样品中微量金属元素的范围为13.13-202.73；7.63–82.71；0.48–22.73；0.72–15.58；0.18–5.12；0.001–1.114；Fe、Zn、Mn、Cu、As、Cd 和 Hg 分别为0.001–0.923 mg·kg ^{-1 。}研究结果为红河沿岸地区海鲜（渔业和水产海鲜）质量数据集做出了贡献。尽管本研究中观察到的不同微量金属元素的平均值低于越南或欧洲食品安全阈值的允许值，但仍检测到了一些高浓度。调查结果表明，需要扩大监测范围（监测频率、样本数量和观察变量），以对该地区的海鲜质量进行全面全面的评估。我们的结果还表明，有必要管理沿海地区的水质，特别是进行水产养殖活动的地区。