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Citation: Wang Lizeng, Li Xiaoqiong, Wen Shiqi, Chen Rongli. DETERMINATION OF FOOD COLOURANT BY ADSORPTIVE STRIPPING VOLTAMMETRY[J]. Chinese Journal of Applied Chemistry, ;1990, 7(3): 82-84. shu

DETERMINATION OF FOOD COLOURANT BY ADSORPTIVE STRIPPING VOLTAMMETRY

1.
Department of Applied Chemistry, Shandong University, Jinan 250100

Received Date: 15 July 1989
Available Online: 16 January 1990

Synthetic food colourants-tartrazine and ponceau-4R are found to be adsorbed strongly on a hanging mercury drop electrode and can thus be determined by linear sweep adsorption voltammetry.The peaks of derivative waves can be produced at -0.74V and -0.82V respec-tively for tortrazine and ponceau-4R in a buffer solution of disodium hydrogen phosphate,pH-8.8. The determination limit is of 3.0×10^-9mol/L and 2.0×10^-9mol/L respectively.The method has been used to the determination of the colourant in food.
- food colourant,
- adsorptive voltammetry,
- tartrazine,
- ponceau-4R
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