Polyethylene Glycol-Ammonium Sulfate-Nitroso R Salt System for the Separation of Cobalt (Ⅱ)
The extraction efficiency of Co2+was systematically evaluated under the condition of a pH 5 buffer solution. Three scenarios were examined:the extraction of Co2+in Co2+alone,Ni2+alone and a mixed Co2+and Ni2+solution. Results indicated that the extraction efficiency reached 75.47％ when Co2+was extracted independently. However,this efficiency was markedly reduced in the mixed solution signifying a significant interference from Ni2+in the spectrophotometric measurement of Co2+through a series of comparative experiments. Subsequently,a comprehensive set of experiments employed spectrophotometry to assess the extraction efficiency of Co2+,scrutinizing variables such as pH,extraction duration and extraction frequency,to identify optimal experimental conditions and improve the extraction efficiency.
Polyethylene glycolSpectrophotometricExtraction ratepHExtraction frequency
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