摘要
华东师大合成的不对称双偶氮氯膦类显色剂是一类新型的稀土显色剂。这类显色剂有偶氮氯膦-mA,偶氮氯膦-mN,偶氮氯膦-mK,偶氮氯膦-PN(以下简称CPA-mA、mN、mK、pN)它们的结构式分别为。
Chorophosphonazo-mA,mK,mN and pN react with Sc in different ways,theα-type reaction and theβ-type reaction.It was found that mK is the best for a-type Sc-determination in routine analysis.Theβ-type reactions are more sensitive.Theβ-type complex of mN and Sc has an absorption maximum at 715nm.The complex formation is complete within 30 minutes in 10ml of aqueous solution containing 1.2 ml of 1:1 HC1 and 2 ml of 1%Arabic gum as stabilising agent,the complex is stable for over 2 hours after dilution.The molar absorptivity is 8.9×l04L.mol^(-1),cm^(-1),at 715nm.Beer’slaw is followed in the concentration range from 7μg to 13μg Sc2O3 with good precision.
作者
胡有云
黄肇敏
吴戌
Hu Yunyun;Huang Zhaomin;Wu Xu
出处
《岩矿测试》
CAS
1988年第1期15-20,共6页
Rock and Mineral Analysis
