Copper(II) diethyldithiocarbamate modified carbon paste electrode for highly selective accumulation of cysteine

Si Xuan Guo, Soo Beng Khoo

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4 Citations (Scopus)

Abstract

A Cu(II)-diethyldithiocarbamate modified carbon paste electrode was found to be highly selective for cysteine accumulation. Of the simple amino acids, only histidine interfered at 10 times the concentration of cysteine. Thiourea and thiocyanate ion interfered only when their concentrations were 30 times and 10 times greater than that of cysteine. The detection limit using differential pulse anodic stripping was 2.00 x 10-6 mol l-1 cysteine and the determination of 5.00 x 10-5 mol l-1 cysteine gave a precision of 3.95% (r.s.d., n = 8).

Original languageEnglish
Pages (from-to)689-700
Number of pages12
JournalAnalytical Letters
Volume32
Issue number4
DOIs
Publication statusPublished - 1999
Externally publishedYes

Keywords

  • Copper diethyldithiocarbamate
  • Cysteine
  • Differential pulse anodic
  • Modified carbon paste electrode
  • Stripping

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