【摘要】 本文研究了多种金属离子与meso-四-(4-三甲铵基苯)卟啉的显色反应动力学特性。利用Pb(Ⅱ)和其它金属离子之间的反应速差,建立了一种选择性好的测定痕量Pb(Ⅱ)的流动注射分析法。将此法应用于陶瓷和人发样品中铅的直接测定,结果满意。更多还原

【Abstract】 The kinetic characteristics of the reactions of Pb²⁺, Zn²⁺, Cu²⁺, Co²⁺, Ni²⁺, Cd²⁺, Hg²⁺, Mn²⁺ and Fe³⁺ with meso-tetra（4-trimethylammoniumphenyl）porphyrin and the influence of other metal ions on the reaction of Pb²⁺ have been studied. On the basis of the different formation rates of metalloporphyrins, a new method for the spectrophotometric determination of trace amounts of Pb²⁺ using merging zone FIA has been developed. It is much more selective than the conventional porphyrin spectrophotometries. The sampling rate is about 60/h with a relative standard deviation of 0. 52%.更多还原