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Citation: ZHENG Jian-Bin, NI Hong-Gang, ZHANG Hong-Fang. Application of KIO₃ to Oscillographic Determination of Vc in a Troche and a Drink[J]. Chinese Journal of Applied Chemistry, ;2005, 22(7): 726-729. shu

Application of KIO₃ to Oscillographic Determination of Vc in a Troche and a Drink

1.
Institute of Analytical Science, Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University, Xi'an 710069

Corresponding author: ZHENG Jian-Bin,
Received Date: 10 September 2004
Available Online: 20 February 2005
Fund Project: 国家自然科学基金资助项目(20275030) (20275030)陕西省自然科学基金项目(2004B20) (2004B20)陕西省教育厅专项科研基金资助项目(01JK076) (01JK076)

In a 0.2 mol/L NaOH solution,KIO₃ can yield two peaks at -0.6 V(vs.SCE) and -1.6 V on the cathode of oscillogram.The reduction at -1.6 V is quite sensitive,its depth would get shallow with the increase of Vc because of the reaction between Vc and KIO₃.Based on this oscillographic character,a new method,second order differential simple oscillographic voltammetry for the determination of Vc in a troche and a drink containing Vc is established in this paper.Under the optimal experimental condition,a linear response was observed in the range 3.0×10^-6~4.5×10^-5 mol/L with a correlation coefficient R=0.995 4 and a detection limit 2.0×10^-6 mol/L for Vc.The relative standard deviation (RSD) and average recovery for the determination of 3.0×10^-5 mol/L Vc are 2.9% and 98.9%(n=5),respec-tively.Thus,the oscillographic determination method in a redox system can be applied to the determination of some non-active substances in oscillographic analysis,and so it is an actually useful approach for enlarging the application field of oscillographic analysis.
- KIO₃,
- Vc,
- oscillographic analysis,
- oscillographic determination,
- drug analysis
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Application of KIO3 to Oscillographic Determination of Vc in a Troche and a Drink

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Application of KIO₃ to Oscillographic Determination of Vc in a Troche and a Drink