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Determination of Rhodium by Inverted Catalytic Hydrogen peak as Analytical peak  

Kwon, Young-Soon (Department of Chemistry, Catholic University)
Lim, Kyong-Hee (Department of Chemistry, Catholic University)
Publication Information
Analytical Science and Technology / v.16, no.4, 2003 , pp. 269-276 More about this Journal
Abstract
A new type of stripping voltammetry, inverted catalytic stripping voltammetry $IC_tSV$, is introduced. The rhodium-formaldehyde complex in hydrochloric acid gives an inverted catalytic hydrogen peak (reduction current peak during positive-going scan). The characteristics of the inverted peak were studied. By using the peak as analytical peak the detection limit of $1.2{\times}10^{-10}M$ Rh (50s preconcentration) can be reached at the optimal conditions: 0.015% (W/V) HCHO-0.42 M HCl; accumulation potential, -1.1 V; scan rate, 100 mV/s.
Keywords
Inverted Catalytic Hydrogen peak rhodium;
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