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Citation: LI Ning, SONG Jun-Feng, XU Mao-Tian. Determination of Tropicamide by Parallel Catalytic Hydrogen Wave[J]. Chinese Journal of Applied Chemistry, ;2004, 21(11): 1093-1096. shu

Determination of Tropicamide by Parallel Catalytic Hydrogen Wave

1.
Institute of Analytical Science, Northwest University, Xi'an 710069

Corresponding author: SONG Jun-Feng,
Received Date: 29 December 2003
Available Online: 25 May 2004
Fund Project: 国家自然科学基金(29875017) (29875017)陕西省自然科学基金(2002B01)资助项目 (2002B01)

In a solution of 0.05 mol/L KCl-1.1×10^-2 mol/L KIO₃ supporting electrolyte, tropicamide was found to yield a parallel catalytic hydrogen wave with a peak potential of 1.79 V(vs.SCE). The second-order derivative peak current of the wave is proportional to the tropicamide concentration in the range of 6.0×10^-8~8.0×10^-5 mol/L with detection limit 3×10^-8 mol/L. The analytical sensitivity of the parallel catalytic hydrogen wave is one order of magnitude higher than that of the corresponding catalytic hydrogen wave. The proposed method was applied to the direct determination of the tropicamide in eye drops without previous treatment. The mechanism of the parallel catalytic hydrogen wave in the presence of KIO₃ was discussed.
- tropicamide,
- KIO₃,
- catalytic hydrogen wave,
- parallel catalytic hydrogen wave
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