Determination of chlorotriazines, methylthiotriazines and one methoxytriazine by SPE-LC-UV in water samples.
Triazine herbicides form a wide group of substances that belong among the most common agrochemicals applied for pre- and post-emergence weed control. So, they can be found in the environment at trace level. In order to determine their concentrations in water samples by the usual analytical techniques, a preconcentration step is commonly necessary. In this paper, a simple analytical method for the quantification of eight triazines (three chlorotriazines, four methylthiotriazines and one methoxytriazine) in water samples by solid phase extraction-reversed phase liquid chromatography (LC) has been developed. LC shows good analytical performance for simultaneous multiple triazine analysis (repeatability <2%, reproducibility <3%), except for prometon (repeatability 5.52%, reproducibility 16%). The results, obtained by using carbograph and polymeric sorbents for solid phase extraction (SPE), have been compared. The limits of quantification achieved permit the application of the proposed SPE-LC method for the determination of eight triazines in water samples (0.0065-0.028 mug l(-1)).
Dopico G
M S
MS
Lab. de Quimica, Dpto de Quimica Analitica, E.U. Politécnica, Centro de Investigacións Tecnolóxicas, Universidad de A Coruña, Campus de Esteiro, Avda 19 de Febrero, Ferrol 15405, Spain.
González R
M V
MV
Castro R
J M
JM
González S
E
E
Pérez I
J
J
Rodrı́guez T
M
M
Calleja
A
A
Vilariño
J M L
JM