Determination of Ge(IV) in rice in a mercury-coated glassy carbon electrode in the presence of catechol |
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Authors: | Suw Young Ly Sang Su Song Sung kuk Kim Young Sam Jung Chang Hyun Lee |
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Affiliation: | 1. Department of fine Chemistry, School of Applied Chemical Engineering, Seoul National University of Technology, 172, gongreung 2 dong, Nowon gu, Seoul 139-743, South Korea;2. Pyongtaek University, Division of General Education |
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Abstract: | 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 μg L−1 Ge(IV). The relative standard deviation at the Ge(IV) concentration of 50 μg L−1 was 1.37% (n = 15) using the optimum condition, and the detection limit was found to be 0.6 μg L−1 (8.26 × 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. |
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Keywords: | Stripping voltammetry Mercury coated glassy carbon Ge(IV) Catechol |
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