海鲜中的无机砷：提取方法重要吗？
Inorganic arsenic in seafood: does the extraction method matter?
机构信息
TESLA-Trace Element Speciation Laboratory, Chemistry, College of Physical Sciences, University of Aberdeen, Aberdeen AB24 3UE, Scotland, UK; MATIS, Environment and Genetics Department, Vinlandsleid 12, Reykjavik 113, Iceland.
MATIS, Environment and Genetics Department, Vinlandsleid 12, Reykjavik 113, Iceland.
出版信息
Food Chem. 2014 May 1;150:353-9. doi: 10.1016/j.foodchem.2013.11.005. Epub 2013 Nov 13.
Nine different extraction methods were evaluated for three seafood samples to test whether the concentration of inorganic arsenic (iAs) determined in seafood is dependent on the extraction method. Certified reference materials (CRM) DOLT-4 (Dogfish Liver) and TORT-2 (Lobster Hepatopancreas), and a commercial herring fish meal were evaluated. All experimental work described here was carried out by the same operator using the same instrumentation, thus eliminating possible differences in results caused by laboratory related factors. Low concentrations of iAs were found in CRM DOLT-4 (0.012±0.003mgkg(-1)) and the herring fish meal sample (0.007±0.002mgkg(-1)) for all extraction methods. When comparing the concentration of iAs in CRM TORT-2 found in this study and in the literature dilute acids, HNO3 and HCl, showed the highest extracted iAs wheras dilute NaOH (in 50% ethanol) showed significantly lower extracted iAs. However, most other extraction solvents were not statistically different from one another.
评估了 9 种不同的提取方法，用于 3 种海鲜样品，以测试海鲜中无机砷 (iAs) 的浓度是否取决于提取方法。评估了认证参考材料 (CRM) DOLT-4（鲨鱼肝）和 TORT-2（龙虾肝胰腺）以及商业鲱鱼鱼粉。此处描述的所有实验工作均由同一位操作员使用相同的仪器进行，从而消除了由于实验室相关因素导致的结果差异。对于所有提取方法，在 CRM DOLT-4（0.012±0.003mgkg(-1)) 和鲱鱼鱼粉样品中均发现 iAs 的低浓度（0.007±0.002mgkg(-1))。当比较本研究中 CRM TORT-2 中 iAs 的浓度与文献中稀酸（HNO3 和 HCl）相比，稀碱（50%乙醇中的 NaOH）显示出最高的 iAs 提取量，而稀碱（50%乙醇中的 NaOH）显示出显著较低的 iAs 提取量。然而，大多数其他提取溶剂彼此之间没有统计学差异。
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