摘要
研究了新试剂1 (2,6 二氯 4 硝基苯) 3 ( 4 硝基苯)-三氮烯(DCNPNPT)与钴 显色反应的适宜条件。在表面活性剂TritonX 100存在下,Na2B4O7-NaOH缓冲液(pH 9 3)介质中,钴 与DCNPNPT形成黄色络合物(1∶2),其最大吸收波长为545nm,用双峰双波长法测定络合物的表观摩尔吸光系数ε=1 08×105,钴在0～240μg/L范围内符合比尔定律。此法已用于VB12针剂和矿样中微量钴 的测定,结果满意。
The color reaction of 1(2,6dichloro4nitrophenyl)3(4nitrophenyl)triazene(DCNPNPT)with Co*' has been studiedIn the presence of Triton X100,the reagent with Co*'forms a yellow complex(1∶2)in the buffer solution of Na2B4O7-NaOH at pH90-95The apparent molar absorptivity is 108×105L·mol1·cm1Beer′s law is obeyed in the range of 0-240μg/L for Co*'Trace cobalt in vitamin B12 and ore samples has been determined by dualwavelength spectrophotometry with satisfactory results
出处
《冶金分析》
CAS
CSCD
北大核心
2002年第5期55-57,共3页
Metallurgical Analysis
关键词
分光光度法
显色反应
钴
矿石
DCNPNPT
显色剂
(2,6dichloro4nitrophenyl)3(4nitrophenyl)triazene
color reaction
cobalt
ore
vitamin B12
