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Citation: WANG Fu-Min. Determination of Fenbufen Based on Its Polarographic Catalytic Wave in the Presence of Persulfate[J]. Chinese Journal of Applied Chemistry, ;2006, 23(10): 1112-1115. shu

Determination of Fenbufen Based on Its Polarographic Catalytic Wave in the Presence of Persulfate

WANG Fu-Min ^,

1.
Department of chemistry and Chemical Engineering, Weinan Teacher's College, Weinan 714000

Corresponding author: WANG Fu-Min,
Received Date: 23 November 2005
Available Online: 25 February 2006
Fund Project: 陕西省教育厅专项科研基金资助项目(03JK216) (03JK216)渭南师范学院科研基金资助项目(06YKS028) (06YKS028)

A catalytic polarographic determination of fenbufen(FBF) in the presence of K₂S₂O₈ was(described).In 0.2 mol/L HAc-NaAc(pH=5.0) buffer,the polarographic reduction of carbonyl group of FBF yielded an irreversible reduction wave at a peak potential E_p of-1.18 V(vs.SCE).When 4×10^-4 mol/L K₂S₂O₈ was present in the buffer,the reduced FBF intermediate was oxidized by persulfate,producing a catalytic wave at the original potential.The analytical sensitivity of the catalytic wave was 10 times higher than that of the corresponding reduction wave.The peak current of the catalytic wave varied linearly with the FBF concentration over the range from 7.08×10^-6 mol/L to 2.36×10^-5 mol/L(r=0.993 1,n=7) and from 2.36×10^-8 mol/L to 7.08×10^-6 mol/L(r=0.998 9,n=8) with a detection limit of 7.78×10^-9 mol/L(3σ).RSD(n=11) was 1.2% at the concentration level of 4.72×10^-7 mol/L.The proposed method was applied to the determination of FBF in the raw material,in tablets and in capsules without previous treatment.
- fenbufen,
- persulfate,
- parallel catalytic wave,
- linear-sweep polarography
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