摘要
本文报道用新试剂2-(5-硝基-2-吡啶偶氮)-5-二甲氨基苯甲酸分光光度法测定微量钴。配合物的表观摩尔吸光系数为1.31×10~5L·mol^(-1)·cm^(-1),Co∶5-NO_2-PAMB=1∶2,Co浓度在0～14μg/25mL范围内服从比耳定律。用于金属有机化合物中微量钴的测定,结果与理论值相符。
The spectrophotometric determination of micro amount cobalt using a new chromogenic reagent 2-(5-nitro-2-Pyridylazo)-5-dimethylaminobenzoic acid (5-NO_2-PAMB) is reported in this paper. The apparent molar absorptivity of the coordination complex is 1.31×10~5L·mol^(-1)·cm^(-1) at 650nm with Co:5-NO_2-PAMB=1:2. Beer's law is obeyed in the range of 0～14μg/25mL Co. This sensitive method has been applied to determine cobalt in organometallic compounds,and the results accord with theoretical values.
出处
《分析试验室》
CAS
CSCD
北大核心
1993年第5期25-27,共3页
Chinese Journal of Analysis Laboratory
关键词
钴
分光光度法
吡啶偶氮
Cobalt determination
spectrophotometry
2-(5-nitro-2-pyridylazo)-5-dimethyl-aminobenzoic acid
