沉积物记录着水体环境变化的丰富信息,其中重金属的含量是评价水体环境的重要指标。文章应用酸溶–电感耦合等离子体质谱法建立了沉积物中常见金属元素钴、铜和铅的检测方法,以内标法定量,计算出3种元素的方法检出限分别为0.01 mg∙kg−1...沉积物记录着水体环境变化的丰富信息,其中重金属的含量是评价水体环境的重要指标。文章应用酸溶–电感耦合等离子体质谱法建立了沉积物中常见金属元素钴、铜和铅的检测方法,以内标法定量,计算出3种元素的方法检出限分别为0.01 mg∙kg−1、0.19 mg∙kg−1和0.27 mg∙kg−1,线性方程相关系数分别是0.9997、1和1,利用该方法分析了3种沉积物有证标准物质GBW07308a (GSD-8a)、GBW07365 (GSD-22)和GBW 07362 (GSD-19),测定值与参考值吻合较好,均在相应标准物质不确定度范围内。精密度实验中钴、铜、铅的相对标准偏差分别为3.93%~6.45%、2.22%~5.34%和2.58%~5.18%,正确度范围为 0.35%~3.69%,方法的精密度和准确性良好、检出限低。用建立的方法测定了某区域内50个沉积物样品,结果表明,本方法符合沉积物中3种重金属元素含量的测试要求,能满足实际环境中水系沉积物中3种重金属元素含量快速、准确测试的需要。方法高效、快速、可行。Sediments record plentiful information about changes in the water environment. The content of heavy metals in the sediment is an important index to evaluate the water environment. The article developed a detection method for common metal elements Co, Cu, and Pb in sediments using acid dissolution-inductively coupled plasma mass spectrometry (ICP-MS), quantifying the elements with the internal standard method. The detection limits for these three elements were calculated to be 0.01 mg∙kg−1 for Co, 0.19 mg∙kg−1 for Cu, and 0.27 mg∙kg−1 for Pb, with correlation coefficients for the linear equations being 0.9997, 1, and 1, respectively. The method was applied to analyze three sediment certified reference materials, GBW07308a (GSD-8a), GBW07365 (GSD-22), and GBW07362 (GSD-19), yielding values that were in good agreement with the reference values and within the uncertainty range of the corresponding standard materials. In the precision experiment, the relative s展开更多
文摘沉积物记录着水体环境变化的丰富信息,其中重金属的含量是评价水体环境的重要指标。文章应用酸溶–电感耦合等离子体质谱法建立了沉积物中常见金属元素钴、铜和铅的检测方法,以内标法定量,计算出3种元素的方法检出限分别为0.01 mg∙kg−1、0.19 mg∙kg−1和0.27 mg∙kg−1,线性方程相关系数分别是0.9997、1和1,利用该方法分析了3种沉积物有证标准物质GBW07308a (GSD-8a)、GBW07365 (GSD-22)和GBW 07362 (GSD-19),测定值与参考值吻合较好,均在相应标准物质不确定度范围内。精密度实验中钴、铜、铅的相对标准偏差分别为3.93%~6.45%、2.22%~5.34%和2.58%~5.18%,正确度范围为 0.35%~3.69%,方法的精密度和准确性良好、检出限低。用建立的方法测定了某区域内50个沉积物样品,结果表明,本方法符合沉积物中3种重金属元素含量的测试要求,能满足实际环境中水系沉积物中3种重金属元素含量快速、准确测试的需要。方法高效、快速、可行。Sediments record plentiful information about changes in the water environment. The content of heavy metals in the sediment is an important index to evaluate the water environment. The article developed a detection method for common metal elements Co, Cu, and Pb in sediments using acid dissolution-inductively coupled plasma mass spectrometry (ICP-MS), quantifying the elements with the internal standard method. The detection limits for these three elements were calculated to be 0.01 mg∙kg−1 for Co, 0.19 mg∙kg−1 for Cu, and 0.27 mg∙kg−1 for Pb, with correlation coefficients for the linear equations being 0.9997, 1, and 1, respectively. The method was applied to analyze three sediment certified reference materials, GBW07308a (GSD-8a), GBW07365 (GSD-22), and GBW07362 (GSD-19), yielding values that were in good agreement with the reference values and within the uncertainty range of the corresponding standard materials. In the precision experiment, the relative s
