卟啉试剂的衍生物与一些金属离子作用的高灵敏度,已引起国内外分析工作者的兴趣。而该试剂用于微量铜的光度法,大部分是利用试剂的减色来进行测定的。我们合成了meso-四-(对磺基苯)卟啉(TPPS_4)试剂 ,采用直接测量试剂和铜的络合物的吸收值。以氟化钠为掩蔽剂,以消除铁、钛等离子的影响。用硼酸避免氟对比色皿的腐蚀。本法在灵敏度、选择性、稳定性等方面均感到满意。操作简单、快速,不经分离能适应某些矿石中微量铜的测定。 (一)主要试剂和仪器 The high sensitivity of porphyrin reagent derivatives to the action of some metal ions has drawn the interest of domestic and foreign analysts. The reagent for trace copper spectrophotometry, most of the use of reagent subtraction to be measured. We synthesized meso-tetrakis- (p-sulfophenyl) porphyrin (TPPS 4) reagent, using a direct measurement of the absorbance of the complex of reagent and copper. Sodium fluoride as a masking agent to eliminate iron, titanium and other plasma effects. Boric acid is used to avoid corrosion of the cuvettes. This Law is satisfied with its sensitivity, selectivity and stability. Simple operation, fast, without separation can be adapted to the determination of trace copper in some ores. (A) of the major reagents and equipment