1 引言 随着超导材料研究的迅速发展,超导材料中组成元素的检测方法研究也就显得非常重要。由于超导薄膜中铜的含量极少,故选用了自制高灵敏度的卟啉类试剂-α,β,γ,δ-,四苯基卟啉(简称TPP)作显色剂。本文研究了TPP与铜显色反应的各种条件,拟定了Bi-Sr-Ca-Cu-O超导薄膜中微量铜的测定方法。 实验表明,在弱酸性介质中,在有盐酸羟胺和阴离子表面活性剂十二烷基硫酸钠存在的条件下,四苯 1 Introduction With the rapid development of research on superconducting materials, the research on the methods of testing the compositional elements in superconducting materials also becomes very important. As the superconducting thin film of copper content is very small, so the selection of home-made high sensitivity porphyrin reagents - α, β, γ, δ -, tetraphenylporphyrin (referred to as TPP) as a developer. In this paper, various conditions for the color reaction of TPP with copper were studied, and the determination method of trace copper in Bi-Sr-Ca-Cu-O superconducting thin films was proposed. Experiments show that in a weak acid medium, in the presence of hydroxylamine hydrochloride and anionic surfactant sodium dodecyl sulfate, tetracene