J. Dugay et Mc. Hennion, EVALUATION OF THE PERFORMANCE OF ANALYTICAL PROCEDURES FOR THE TRACE-LEVEL DETERMINATION OF AMINOTRIAZOLE IN DRINKING WATERS, TrAC. Trends in analytical chemistry, 14(8), 1995, pp. 407-414
Aminotriazole is a widely used pesticide which is very difficult to an
alyze at the regulatory level of 0.1 mu g/l level in drinking water, b
ecause of its high water solubility which makes it difficult to extrac
t from aqueous media. The extraction procedures that can be performed,
i.e., evaporation and solid-phase extraction using ion-exchanger or i
on-pair sorbents are evaluated, Their off-line analysis by HPLC in the
reversed-phase or in the ion-exchange mode, coupled with electrochemi
cal detection or UV after derivatization, is discussed. It is shown th
at no routine method allows quantification at the 0.1 mu g/l level. Mo
reover, there is a strong interdependence between the preconcentration
, the chromatographic separation, and the detection steps of the total
analytical procedure, For example, it is shown to be impossible to co
uple ion-exchange preconcentration or evaporation to the best performi
ng analysis, which is obtained by ion-exchange chromatography with ele
ctrochemical detection.