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Citation: Xinhao Yan, Guoliang Hu, Ruixi Chen, Hongyu Liu, Qizhi Yao, Jiao Li, Lingling Li. Polyethylene Glycol-Ammonium Sulfate-Nitroso R Salt System for the Separation of Cobalt (II)[J]. University Chemistry, ;2024, 39(6): 287-294. doi: 10.3866/PKU.DXHX202310073 shu

Polyethylene Glycol-Ammonium Sulfate-Nitroso R Salt System for the Separation of Cobalt (II)

Xinhao Yan ² ,
Guoliang Hu ² ,
Ruixi Chen ² ,
Hongyu Liu ^1,2 ,
Qizhi Yao ^1,2 ,
Jiao Li ^1,2 ,
Lingling Li ^1,2

1.
National Demonstration Center for Experimental Chemistry Education(University of Science and Technology of China), Hefei 230026, China;
2.
School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China

Received Date: 19 October 2023
Revised Date: 26 January 2024

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 glycol,
- Spectrophotometric,
- Extraction rate,
- pH,
- Extraction frequency
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