摘要
合成了安替比林基重氮氨基－２，４－二硝基苯（ＡＰＤＮＢＴ）新试剂，并首先研究了它的分析性质及其与镉的显色反应。在ＴｒｉｔｏｎＸ－１００存在下，试剂的两级质子离解常数的ｐＫａ值分别是０．８和１０．８；在ｐＨ＝１０．２～１２．０的Ｂ－Ｒ缓冲溶液中，试剂与镉生成１：２的黄色配合物，呈褪色反应，吸光度差值最大的波长为５４０ｎｍ，其表观摩尔吸光系数为１．５２×１０＾５Ｌ／（ｍｏｌ．ｃｍ）。
A new reagent, 1-antipyrinyldiazoamino-2, 4-dinitrobenzene (APDNBT), was synthesized inthis laboratory and some of its analytical properties and its colour reaction with cadmiumwere studied in the presence of TirtonX-100, the pKa values of ionization constants for thereagent are 0.8 and 10.8 respectively. The reagent reacts with cadmiumion to form a yellowcomplex, the ratio of which is that the metal-to-ligand was 1:2. In the presence of Triton X-100and at pH=10. 2～12. 0, the maximum differece of absorption is at 540nm with an apparent molarabsorptivity of 1.52×10~5L/mol.cm and Beer's law is obeyed in the range of 0～15μg per 25 mL.
出处
《分析测试学报》
CAS
CSCD
1993年第6期15-18,共4页
Journal of Instrumental Analysis
关键词
镉
安替比林基
重氮氨基
二硝基苯
Cadmium
1-Antipyrinyldiazoamino-2
4-Dintrobenzene
