This study aims at fractionation of arsenic according to its polarity into water-soluble arsenic fractions, polar and non-polar arsenolipids in herring, capelin and blue whiting fish meal and edible seaweed dulse. Changing the sequential extraction order showed a significant labile fraction of the non-polar arsenolipids (AsLps) where species transformation is considered a more likely explanation than a partitioning problem in the compounds. The majority of non-polar AsLps were not stable through water extraction for three types of fish meal (71–93% for herring, capelin and blue whiting). The non-polar AsLp fraction was minor for dulse. In 27 samples of herring and blue whiting fish meal, arsenic was mainly present in the water phase: 71% (2.8 ± 0.8 mg kg⁻¹) and 93% (17.2 ± 1.9 mg kg⁻¹) for herring and blue whiting on average, respectively. The polar arsenolipids in the MeOH/DCM fraction accounted for 15% and 5% (0.5–1.2 mg kg⁻¹ As) for both herring and blue whiting, respectively. Speciation analysis of arsenolipids was undertaken for herring meal, capelin meal and dulse (red seaweed) using simultaneous HPLC-ICPMS/ESIMS for quantification and identification. Among the known arsenohydrocarbons (AsHCs), arseno fatty acids (AsFAs) and arsenosugarphospholipids (AsPLs), a novel AsFA374 was identified in dulse by arsenic detection via simultaneous protonated mass, accurate mass as well as MSMS fragmentation. Additionally, recently reported AsLp groups, arsenic containing phosphatidylcholines (AsPCs) and arseno fatty alcohols (TMAsFOHs), have been reconfirmed to occur in marine samples.

中文翻译：

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商业鱼粉和食用海藻样品中不稳定和稳定的非极性砷脂的定量†

这项研究的目的是根据砷的极性将其分离成水溶性砷馏分，鲱鱼，毛鳞鱼和蓝鳕鱼粉中的极性和非极性砷脂以及可食用的紫菜。改变顺序提取顺序显示了非极性砷脂（AsLps）的不稳定部分，其中物种转化比化合物中的分配问题更可能是解释。对于三种类型的鱼粉，大多数非极性AsLps在通过水提取后均不稳定（鲱鱼，毛鳞鱼和蓝鳕鱼的71-93％）。非极性的AsLp分数对dulse的影响很小。在27个鲱鱼和蓝鳕鱼粉样品中，砷主要存在于水相中：71％（2.8±0.8 mg kg ^-1）和93％（17.2±1.9 mg kg ^-1））分别代表鲱鱼和蓝鳕鱼。鲱鱼和蓝鳕鱼中，MeOH / DCM馏分中的极性砷脂分别占15％和5％（0.5–1.2 mg kg ^-1 As）。使用同时HPLC-ICPMS / ESIMS进行鲱鱼粉，毛鳞鱼粉和杜乐粉（红海藻）的砷脂形态分析，以进行定量和鉴定。在已知的砷化碳氢化合物（AsHCs），砷化氢脂肪酸（AsFAs）和砷化糖糖脂（AsPLs）中，通过砷的检测通过消光法鉴定了一种新型的AsFA374 。同时质子化质量，精确质量以及MSMS碎片化。此外，最近已证实，AsLp基团，含砷的磷脂酰胆碱（AsPCs）和砷化脂肪醇（TMAsFOHs）已在海洋样品中被证实存在。