Determination of Rhodium by Inverted Catalytic Hydrogen peak as Analytical peak
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2003, v.16 no.4, pp.269-276
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(2003). Determination of Rhodium by Inverted Catalytic Hydrogen peak as Analytical peak. , 16(4), 269-276.
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
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Inverted Catalytic Hydrogen peak rhodium