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Citation: QU Wan-Yun, YANG Chun-Hai, HUANG Wen-Sheng. Electrochemical Determination of Sudan Ⅰ Based on Enhancement Effect of Sodium Dodecyl Benzene Sulfonate[J]. Chinese Journal of Applied Chemistry, ;2009, 26(9): 1065-1069. shu

Electrochemical Determination of Sudan Ⅰ Based on Enhancement Effect of Sodium Dodecyl Benzene Sulfonate

1.
School of Chemical and Environmental Engineering, Hubei Institute for Nationalities, Enshi 445000

Corresponding author: QU Wan-Yun,
Received Date: 2 September 2008
Available Online: 10 December 2008
Fund Project: 湖北省教育厅优秀中青年人才(Q20082902)资助项目 (Q20082902)

The electrochemical behavior of Sudan I was examined by means of linear sweep voltammetry(LSV),cyclic voltammetry(CV) and chronocoulometry.At the carbon paste electrode(CPE),a non-sensitive oxidation peak was observed for Sudan Ⅰ.However,the oxidation peak current of Sudan Ⅰ remarkably increased after sodium dodecyl benzene sulfonate(SDBS) was added at a low concentration,suggesting that SDBS exhibtis an efficient enhancement effect towards Sudan Ⅰ.The results obtained from chronocoulometry indicate that SDBS significantly improves the adsorption of Sudan Ⅰ at the CPE surface.The experimental parameters such as pH value,concentration of SDBS,accumulation potential and time were optimized,and a new electrochemical method was then developed for the determination of Sudan Ⅰ.The linear range was from 2.0×10^-7 to 1.5×10^-5 mol/L,and the limit of detection was 6.0×10^-8 mol/L after 180 s accumulation.Finally,this method was successfully used to detect Sudan Ⅰ in hot pepper and ketchup food.
- Sudan dye,
- surfactant,
- electrochemical determination,
- food analysis
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