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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

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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Abstract

A new type of stripping voltammetry, inverted catalytic stripping voltammetry <TEX>$IC_tSV$</TEX>, 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 <TEX>$1.2{\times}10^{-10}M$</TEX> 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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Analytical Science and Technology