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| 电感耦合等离子体质谱法测定海产品中铅及其同位素比值 |
| Detection of Lead and Isotope Ratio of Lead in Sea Product by Inductively Coupled Plasma Mass Spectrometry |
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| DOI： |
| 中文关键词: 铅 同位素比值 电感耦合等离子体质谱法 海产品 |
| 英文关键词: Lead Ratio of isotopes Inductively coupled plasma mass spectrometry Sea products |
| 基金项目:国家自然科学基金资助项目（No.11375117） |
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| 中文摘要: |
| 采用微波消解，电感耦合等离子体质谱法测定海产品中铅含量及其同位素比。通过选择本底铅浓度低的硝酸降低背景值，选择合适内标以减少仪器波动带来的误差，使得该方法在0 μg/L~100 μg/L范围内线性良好，204Pb、206Pb、207Pb和208Pb的方法检出限为0.041 μg/L ~0.180 μg/L。用该方法测定有证标准物质，结果在标准值范围内，海产品样品6次测定结果的RSD为3.1%~8.6%，加标回收率为89.9%~96.3%。26种海产品中总铅质量比为0.018 mg/kg~2.32 mg/kg，铅同位素 207Pb/206Pb值为0.783 55~0.881 61。 |
| 英文摘要: |
| A method of detecting the concentration of lead and ratio of lead isotopes in sea products via microwave digestion inductively coupled plasma mass spectrometric analysis was built. Nitric acids were selected according to reagent blank in order to reduce lead concentration brought by nitric acids. Error of instrument fluctuations was decreased by choosing suitable internal standards, linearity of standard cruve was good at 0 μg/L~100 μg/L. Detection limits of this method for 204Pb、206Pb 、207 Pb and 208Pb were ranged from 0.041 μg/L to 0.180 μg/L respectively. By analysis with this method, lead concentration of reference material GBW08571 and GBW10068 were 1.90 mg/kg and 1.22 mg/kg,and relative standard deviation were 2.3% and 3.6%； isotope ratio(207Pb/206Pb) of NB S981 was 0.913 53 with relative standard deviation 3.8%； relative standard deviation (precision) of lead in sea products was 3.1%～8.6%,and recovery of standard addition was 89.9%~96.3%； lead concentration and isotope ratio(207Pb/206Pb) in 26 kinds of sea products were 0.018 mg/kg～2.32 mg/kg,0.783 55～0.881 61 separately. |
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