Acta Chimica Sinica ›› 1988, Vol. 46 ›› Issue (3): 285-289. Previous Articles     Next Articles

Original Articles

Triton X-100存在下钴与α-(α-噻唑偶氮)-5-二甲氨基苯甲酸的胶束显色反应

沈含熙;王振清;李文兰;叶嘉瑜;潘雪珍;焦方喜   

  1. 南开大学化学系;天津市化学试剂研究所
  • 发布日期:1988-03-15

Studies on the micellar color reaction of cobalt with 2-(2-thiazolylazo-5-dimethylaminobenzoic acid in the presence of triton X-100

SHEN HANXI;WANG ZHENQING;LI WENLAN;YE JIAYU 2;PAN XUEZHEN 2;JIAO FANXI 2   

  • Published:1988-03-15

The micellar color reaction of cobalt with 2-(2-thiazolylazo)-5-dimethylaminobenzoic acid (TAMB) in the presence of nonionic surfactant was investigated. The pH range for the complex formation is within 3.8-5.8; the complex is stable in 2 mol. dm-3 HCl. The complex shows an absorption max. at 668 nm with apparent molar absorptivity of 1.22 ?105 dm3 mol-1 cm-1. Beer's law is obeyed up to 10.0 mg Co/25 mL. The ratio of Co:TAMB in the complex is 1:3 by different methods; the oxidation state of cobalt ions in the complex is Co3+. The L-M electronic transition of the complex was proved.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, MICELLE, COBALT, INFRARED SPECTROPHOTOMETRY, COLOUR REAGENTS, COLOR REACTION, BENZENECARBOXYLIC ACID P, NON IONIC SURFACTANTS, COBALT COMPLEX, THIAZOLE-AZO COMPOUNDS

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