title: Trace analysis of triazines and organophosphorus pesticides in water.
abstract: A method for the determination of trace levels of triazines and organophosphorus pesticides in water is presented. The extraction method is based on a solid-phase extraction on C-18 bound silica SPE cartridges. A precolumn filled with Merck C-18 bound silica and home-made C-18 bound silica have been tested at a flow-rate of 3 ml/min with comparable preconcentration yields. A SIM-MS method using a (15)N labelled internal standard has been developed for the organophosphorus pesticides. Detection limits lower than 1 microg/L have been obtained. Separations have been carried out on a conventional GC column OV 17 (1 m) and a capillary column OV 17 (25 m) with a temperature program from 150 degrees C (2 min) to 300 degrees C (rate of 6 degrees C/min).
authors.affiliation: Institute of Isotopic and Molecular Technology, PO Box 700, R-3400, Cluj-Napoca 5, Romania.
authors.forename: M
authors.initials: M
authors.lastname: Culea
authors.forename: I
authors.initials: I
authors.lastname: Fenesan
authors.forename: S
authors.initials: S
authors.lastname: Cobzac
authors.forename: S
authors.initials: S
authors.lastname: Gocan
authors.forename: M
authors.initials: M
authors.lastname: Chiriac
authors.forename: N
authors.initials: N
authors.lastname: Palibroda