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

Authors
Guo, SX Khoo, SB
Citation
Sx. Guo et Sb. Khoo, Copper(II) diethyldithiocarbamate modified carbon paste electrode for highly selective accumulation of cysteine, ANAL LETTER, 32(4), 1999, pp. 689-700
Citations number
10
Categorie Soggetti
Chemistry & Analysis","Spectroscopy /Instrumentation/Analytical Sciences
Journal title
ANALYTICAL LETTERS
ISSN journal
00032719 → ACNP
Volume
32
Issue
4
Year of publication
1999
Pages
689 - 700
Database
ISI
SICI code
0003-2719(1999)32:4<689:CDMCPE>2.0.ZU;2-X
Abstract
A Cu(II)-diethyldithiocarbamate modified carbon paste electrode was found t o be highly selective for cysteine accumulation. Of the simple amino acids, only histidine interfered at 10 times the concentration of cysteine. Thiou rea and thiocyanate ion interfered only when their concentrations were 30 t imes 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 an d the determination of 5.00 x 10(-5) mol l(-1) cysteine gave a precision of 3.95% (r.s.d., n = 8).