【摘要】 用FI HG AAS系统对K2 Cr2 O7体系铅烷发生的碱性模式与酸性模式进行了对比研究 ,观察反应中反应物摩尔量与铅烷产率关系后发现酸性模式与碱性模式有相同的规律 .采用高浓度K2 Cr2 O7氧化 ,其还原产物Cr(Ⅲ )会生成CrBn 沉淀 ,严重吸附铅离子 ,导致铅信号下降更多还原

【Abstract】 A comparison of acidic mode with alkaline mode of plumbane generation for K 2Cr 2O 7 system by using a FI HG AAS experimental method is reported.Observing the relation of reactant mole number with plumbane production,it is found that the rules of both modes are similar.Using high concentraction K 2Cr 2O 7 oxidation,it’s reduction product Cr(Ⅲ) will be precipitated as CrB n which adsorbs severely lead ion,leading to depression of Pb signals.更多还原