Determination of Ge(IV) in rice in a mercury-coated glassy carbon electrode in the presence of catechol

作者：Ly SY^*; Song SS; Kim SK; Jung YS; Lee CH

来源：Food Chemistry, 2006, 95(2): 337-343.

DOI：10.1016/j.foodchem.2005.02.029

• stripping voltammetry
• mercury coated glassy carbon
• Ge(IV)
• catechol

Electrochemical adsorptive cathodic stripping voltammetry determination of Ge(IV) using the catechol complex on a mercury-coated (MC) electrode was prepared using a glassy carbon electrode (GCE), the peak potential of which was -0.5 V vs. Ag/AgCl on MCGCE. The various parameters of the catechol concentration, its pH, and others were optimized. The linear working ranges were obtained in the concentration of 2-700 mu g L-1 Ge(IV). The relative standard deviation at the Ge(IV) concentration of 50 mu g L-1 was 1.37% (n = 15) using the optimum condition, and the detection limit was found to be 0.6 mu g L-1 (8.26 x 10(-9) M) (S/N = 3), with an adsorption time of 180 s. The Ge(IV) response was highly linear. This developed method was applied to Ge(IV) to determine the presence of rice grains.

• 出版日期2006-3