KINETIC-SPECTROPHOTOMETRIC DETERMINATION OF DIQUAT BASED ON A CHARGE-TRANSFER COMPLEX WITH CYSTEINE

Authors
PEREZRUIZ T MARTINEZLOZANO C TOMAS V CASAJUS R
Citation
T. Perezruiz et al., KINETIC-SPECTROPHOTOMETRIC DETERMINATION OF DIQUAT BASED ON A CHARGE-TRANSFER COMPLEX WITH CYSTEINE, Analyst, 119(7), 1994, pp. 1557-1560
Citations number
37
Categorie Soggetti
Chemistry Analytical
Journal title
Analyst → ACNP
ISSN journal
00032654
Volume
119
Issue
7
Year of publication
1994
Pages
1557 - 1560
Database
ISI
SICI code
0003-2654(1994)119:7<1557:KDODBO>2.0.ZU;2-I
Abstract
The reaction involving the formation of a charge-transfer complex betw een diquat and cysteine was studied. The initial rate of the reaction, measured as a change in absorbance at 495 nm during 60 s, was linearl y related to diquat concentrations from 0.5 to 28.0 mu g cm(-3). The a pplicability of the method was demonstrated by the determination of di quat in commercial herbicides, waters, soils and potatoes.