摘要
Cadmium has been determined by β-correction spectrophotometry with cadion,p-nitrobenzenediazoaminoaz-obenzone,and a non-ionic surfactant,tuiton X-100.The real absorbance of a Cd-cadion chelate in the colored solution can be accurately determined and the complex-ratio of cadion with Cd(II) has been worked out to be 2.Beer's law is obeyed over the concentration range of 0-0.20mg/1 cadmium and the detec-tion limit for cadmium is only 0.003mg/1.Satisfactory experimental results are presented with respect to the determination of trace cadmium in wastewaters.
Cadmium has been determined by β-correction spectrophotometry with cadion, p-nitrobenzenediazoaminoaz-obenzone, and a non-ionic surfactant, triton X-100. The real absorbance of a Cd-cadion chelate in the colored solution can be accurately determined and the complex-ratio of cadion with Cd(II) has been worked out to be 2. Beer's law is obeyed over the concentration range of 0-0.20mg/l cadmium and the detection limit for cadmium is only 0.003 mg/l. Satisfactory experimental results are presented with respect to the determination of trace cadmium in wastewaters.
