铅、镉-四（4-三甲胺苯基）卟啉络合物吸附波及其同时测定

铅、镉-四（4-三甲胺苯基）卟啉络合物吸附波及其同时测定 POLAROGRAPHIC ADSORPTIVES WAVES OF LEAD AND CADMIUM WITH MESO-TETRA（4-TRIMETHYLAMMONIUMPHENYL）PORPHYRIN COMPLEXES AND THEIR SIMULTANEOUS DETERMINATION BY A SINGLE SWEEP POLAROGRAPHY 王长发 1 first-author 陈建林 1 谭鄂 1 赵藻藩 1 武汉大学化学系 武汉大学化学系 研究了铅、镉与四（4-三甲胺苯基）卟啉络合物,在碱性介质中于汞电极上产生的灵敏吸附极谱波.当表面活性物质TritonX-100存在时,对吸附波有增敏和分辩作用.对Pb（Ⅱ）和Cd（Ⅱ）,其峰电位分别为-1.08V和-1.25V（vs.SCE）;导数波高与二者浓度的线性范围分别为0.005～2mg·L -1 和0.005～1mg·L -1 ;检出限均达0.005mg·L -1 该方法已应用于大米、皮蛋及自来水中微量铅和镉的同时测定,得到满意结果. The polarographic adsorptive waves for complexes of lead（I） and cadmium（I） with meso-te- tra （4-trimethylammoniumphenyl） porphyrin （T （4-TAMP） P） were studied and a sensitive polaro- graphic method for simultaneous determination of trace amounts of Pb and Cd has been developed. In 0. 25mol·L -1 KOH medium, the peak potentials of their waves are -1.08V for Pb（I）T（4-TMAP） P and -1.25V for Cd（I）T（4-TMAP）P（vs. SCE）, and the peak heights are linearly proportional to their concentration over the range of 0.005 2 mg·L -1 and 0.005 l mg·L -1 , respectively. Both the detection limits are 0.005mg·L -1 . The method was applied to the determination of trace amounts of Pb and Cd in rice, preserved egg and tap water with satisfactory results. In addition, the enhancement effect of TritonX-100 on the adsorpitive waves has been discussed, and the mechanism of their electrode reaction has also been presented. 铅 镉 卟啉 络合物吸附波 lead cadmium porphyrin polarography 662;O611 1993-01-01 2021-04-01 1