大气颗粒铅污染-陈建敏.ppt

推行车用汽油无铅化过程中上海市大气颗粒物铅污染来源变化 陈建敏 中国科学院上海应用物理研究所 核分析技术重点实验室 仪器参数设置Instrument settings 不同浓度NIST SRM981Pb标准溶液同位素比值测量结果The Pb isotope ratios in NIST SRM981 standard solutions of different concentration 优化的ICP-MS仪器的操作条件Optimized experimental conditions and operating parameters of ICP-MS 　NIST981Pb标准溶液同位素比ICP-MS和TIMS测定结果The isotopic results measured by ICP-MS and TIMS In addition to TSP samples, typical source related samples were also analyzed for tracing the lead origin. * * 停留时间对铅同位素比值测定的影响 Effect of dwell time on Pb isotope ratios measurement 总的积分时间对铅同位素比值测定精度的影响 Effect of sweeps on precisions of Pb isotope ratios measurement Fig.2. Isotope ratio for 207Pb/206Pb and the concentrations in lead contents of the twelve TSP samples collected daily from PuTuo district in Jan, 2002. Characteristic of airborne Pb contamination Variations in lead concentration in the air collected during the period 1995–2003. (a) At HuangPu and PuTuo districts and (b) YangPu district. Isotope variations for 207Pb/206Pb (a) and for 208Pb/206Pb (b) in TSP samples during the period 1995-2003.