【摘要】 本文研究了在适量镉和混合表面活性剂存在下,meso-四（4-乙酰氧基苯）卟啉[T（4-AOP）P]与Au（Ⅲ）的显色反应。结果表明,在pH10.0～11.2介质中,Au（Ⅲ）与T（4-AOP）P形成了灵敏度很高的稳定络合物,其摩尔吸光系数ε_420nm=1.62×10⁶L·mol^-1。cm^-1,金（Ⅲ）浓度在0～1.2μg/10ml范围内服从比耳定律。络合物中的摩尔比为Au（Ⅲ）:T（4-AOP）P=1:1。用泡沫塑料预分离富集金;将拟定的新方法应用于岩矿中金的测定,得到较为满意的结果。更多还原

【Abstract】 A highly sensitive color reaction of gold( Ⅲ )with meso-tetrakis(4-aeetyloxylphenyl)porphyrin[T-(4-AOP)P]has been studied in the presence of Cd( Ⅲ ), sodium dodecyl sulfate and Triton X-100. It shows that gold( Ⅲ ) complex forms at pH 10.,0-11. 2 by heating at 100℃ for 6 min, and the molar absorptivity of the complex is 1. 62×106 L · mol-l · cm"1 at 420 nm. The complex is stable for at least 80 min. The molar ratio of Au( Ⅲ ) to T(4-AOP)P is found to be 1 : 1. Beer’s law is obeyed in the range of 0-1. 2 μg/10 ml for gold( Ⅲ ). Tolerance limit has been shown for 30 cationic ions by using masking-agents, combining with the separation and preconcentration of gold by polyurethane foamed plastics, the method has been applied to the determination of gold in some geological samples with satisfactory results.更多还原