Abstract A method for the determination of inorganic arsenic (iAs) without chromatography using hydride generation — inductively coupled plasma mass spectrometry (HG-ICPMS) is applied to 40 brown macroalgae samples (Fucus vesiculosus, Ascophyllum nodosum, Saccharina latissima). Determining iAs in seaweed matrices is a challenge and, in this study, using 2% HNO3 and 3% H2O2 extraction media the HG-ICPMS outperformed the most commonly used method of HPLC-ICPMS for the determination of iAs in the seaweed samples. There was a good comparison between the simple and fast HG-ICPMS and the more accurate but time-consuming HPLC-HG-ICPMS. Linear regression showed reasonable linearity (R2 of 0.82), with a slope slightly higher than 1 (1.15 ± 0.09) and intercept 0.03 ± 0.01 when comparing the concentrations of iAs determined with the two methods. Hence there is a minor overestimation of iAs with HG compared to the HPLC-HG, however, the method is well suited as a quick screening method. The iAs concentration was below 1% of total arsenic concentration for all the seaweed samples irrespective of using HG-ICPMS or HPLC-HG-ICPMS.

中文翻译：

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使用氢化物​​发生电感耦合等离子体质谱法 (HG-ICPMS) 选择性快速筛选海藻中的无机砷

摘要 对 40 种棕色大型藻类样品（Fucus vesiculosus、Ascophyllum nodosum、Saccharina latissima）应用了一种无需使用氢化物​​发生色谱法测定无机砷 (iAs) 的方法——电感耦合等离子体质谱法 (HG-ICPMS)。测定海藻基质中的 iAs 是一项挑战，在本研究中，使用 2% HNO3 和 3% H2O2 萃取介质，HG-ICPMS 在测定海藻样品中的 iAs 方面优于最常用的 HPLC-ICPMS 方法。简单快速的 HG-ICPMS 与更准确但耗时的 HPLC-HG-ICPMS 之间进行了很好的比较。线性回归显示出合理的线性（R2 为 0.82），当比较两种方法测定的 iAs 浓度时，斜率略高于 1 (1.15 ± 0.09)，截距为 0.03 ± 0.01。因此，与 HPLC-HG 相比，使用 HG 略微高估了 iAs，但是，该方法非常适合作为快速筛选方法。无论使用 HG-ICPMS 还是 HPLC-HG-ICPMS，所有海藻样品的 iAs 浓度均低于总砷浓度的 1%。