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Citation: WU Ling-Li, ZHANG Huan-Huan, LI Quan-Min. Spectrophotometric Determination of Hydroquinone with Sodium 1,2-Nnaphthoquinone-4-sulfonate as Chromogenic Reagent[J]. Chinese Journal of Applied Chemistry, ;2009, 26(4): 462-466. shu

Spectrophotometric Determination of Hydroquinone with Sodium 1,2-Nnaphthoquinone-4-sulfonate as Chromogenic Reagent

1.
a College of Chemistry and Environmental Science, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007;
2.
b College of Agriculture and Medicine, Henan Redio & Television University, Zhengzhou

Corresponding author: LI Quan-Min,
Received Date: 9 April 2008
Available Online: 6 June 2008
Fund Project: 河南省教育厅自然科学基金资助项目(2008B150011) (2008B150011)

A novel and simple spectrophotometric method for determination of hydroquinone with 1,2-naphthoquinone-4-sulfonate reagent was developed.The method was based on 2-hydroxy-1,4-naphthoquinone(lawsone) formed from hydroxyl ion and NQS in a buffer solution of pH=13.00 with hydroquinone as a catalyst.Absorbency was linearly proportional to the concentration of hydroquinone in a range of 1.3×10^-7~1.32×10^-5 g/mL at the maximal absorption wavelength of 454 nm.The equation of linear regression was A=0.025 61+0.073 28c(1×10⁵ mol/L),with a correlation coefficient of 0.995 5.The detection limit was 9×10^-8 g/mL(3σ/k),and the recovery was in a range of 96.5%~103%.The method has been successfully applied to the determination of hydroquinone in water.
- hydroquinone,
- sodium naphthoquinesulfonate,
- spectrophotometry
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