摘要
以 8 氨基喹啉为母体合成了 5 [(4 氯 2 膦酸基苯基 )偶氮 ] 8 氨基喹啉 (CPPAQ)。在pH8 1的硼砂缓冲溶液中 ,试剂与钴形成紫色络合物 ,其最大吸收波长位于 5 90nm ,表观摩尔吸光系数ε=1 2 8× 10 5 ,钴量在 0～ 10 μg/ 2 5mL范围内符合比尔定律 ,方法用于VB1 2 中钴的测定 。
The new color reagent of 5 [(4 chloro 2 phosphonophenylazo)] 8 aminoquinoline (CPPAQ) has been synthesized The complex of Co(Ⅱ) CPPAQ shows an absorption maximum at 590nm with an apparent molar absorptivity of 1 28×10 5L·mol -1 ·cm -1 in the buffer solution of borax at pH 8 1 Beers law is obeyed in the range of 0～10μg/25mL for cobalt This method has been used for the determination of cobalt in VB12 with satisfactory results
出处
《冶金分析》
CAS
CSCD
北大核心
2001年第3期10-11,共2页
Metallurgical Analysis
