为建立同时检测干制水产品中铅、砷、铝、铬、铁、铜金属残留的电感耦合等离子体质谱(Inductively coupled plasma mass spectrometry,ICP-MS)方法。选择自动石墨消解仪对样品进行消解,消解完全后,利用ICP-MS对样液进行检测,内标法定量分析。结果显示:铅、砷、铝、铬、铁、铜元素浓度在0.25~25 μg/L范围内线性良好,相关系数(R²)均大于0.990;检测限:铅0.02 μg/L、砷0.08 μg/L、铝0.12 μg/L、铬0.10 μg/L、铁0.03 μg/L、铜0.05 μg/L;加标回收率在84.0%~108.4%之间;方法重复性RSD(n=6)低于10%。该方法操作简单、准确度高、检测限低、重复性好,可以用于干制水产品中的金属元素检测。

This study aimed to establish a method that uses inductively coupled plasma mass spectrometry (ICP-MS) to simultaneously determine lead, arsenic, aluminum, chromium, iron, and copper in dried aquatic products. Samples were digested in automatic graphite digestion, followed by quantitative tests using internal standard method by ICP-MS. The results showed that the concentrations of lead, arsenic, aluminum, chromium, iron, and copper showed good linear relationships in the range of 0.25-25 μg/L, with correlation coefficients (R²) higher than 0.990. The detection limits for lead,arsenic,aluminum,chromium,iron,and copper were 0.02 μg/L, 0.08 μg/L, 0.12 μg/L, 0.10 μg/L, 0.03 μg/L, and 0.05 μg/L, respectively. The recovery rate was 84.0%-108.4%. The relative standard deviation of reproducibility was less than 10% (n=6). This method was proved to be simple, accurate, with low detection limits and good reproducibility, which can be used to detect metals in dried aquatic products.