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Citation: Fu Yewei, Zheng Jianbin, Xi Na, Gao Hong. Determination of Trac Cobalt in Molecular Sieve by Simple Differential Oscillographic Voltammetry[J]. Chinese Journal of Applied Chemistry, ;1998, 15(1): 104-106. shu

Determination of Trac Cobalt in Molecular Sieve by Simple Differential Oscillographic Voltammetry

Institute of Electroanalytical Chemistry, Northwest University, Xi'an 710069

Received Date: 7 March 1997
Revised Date: 13 October 1997

Trace amount of cobalt in molecular sieve was determined by simple differential oscillographic voltammtry in Co-PAR system (PAR=4-(2-pyridylazo) resorcinol). Results showed that in a solution of 0.2 mol/L HAc-0.2 mol/L NaAc-2.5 × 10^-5 mol/L PAR (pH=4.7) cobalt was able to cause a sharp incision on the cathodeic branch of the oscillogram at -1.68 V(vs. SCE). The method is simple, rapid and has less interferences than spectropho-tometry.
- cobalt,
- trace determination,
- oscilloanalysis,
- PAR,
- molecular sieve
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