Citation: Ling Li Wu, Wei Zhao, Quan Min Li. Indirect determination of cefradine with n-propyl alcohol-ammonium sulfate-water system by extraction-flotation of cuprous thiocyanate[J]. Chinese Chemical Letters, ;2008, 19(5): 565-568. doi: 10.1016/j.cclet.2008.03.033 shu

Indirect determination of cefradine with n-propyl alcohol-ammonium sulfate-water system by extraction-flotation of cuprous thiocyanate

Ling Li Wu ^a,b, ,
Wei Zhao ^a ,
Quan Min Li ^a

a College of Chemistry and Environmental Science, Henan Normal University, The Key Laboratory of Environmental Pollution Control Technology of Henan province, Xinxiang 453007, China;
b Henan Radio and Television University, Zhengzhou 450008, China

Received Date: 27 December 2007

A new method was developed for the determination of cefradine by extraction-flotation of CuSCN. The experiment indicatedthat in the presence of 0.20 mol/L NaOH the degradation of cefradine took place in water bath at 100℃. The thiol group (-SH) ofthe degradation product could reduce Cu(Ⅱ) to Cu(Ⅰ) for the formation of the emulsion CuSCN in the presence of NH₄SCN at pH4.0. By determining the residual amount of Cu(Ⅱ) in the solution and calculating the flotation yield of Cu(Ⅱ), the indirectdetermination of cefradine can be obtained. This method has been applied to determine cefradine in capsules, human serum andurine samples, respectively.
- Cefradine,
- Copper(Ⅱ),
- n-Propyl alcohol,
- Extraction-flotation.
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