Programmable temperature vaporization interface for on-line trace-level enrichment - GC-MS of micropollutants in surface water

In the present study, a fully automated solid-phase extraction (SPE) system , a programmed temperature vaporization (PTV) interface, and gas chromatogr aphy (GC) with mass spectrometric (MS) detection are combined for the trace -level analysis of micropollutants in surface water. The PTV interface is s elected because of its reliability regarding large volume injection and its robustness when analyzing real-life samples. The mass spectrometer was use d both in the full-scan and the selected ion monitoring modes and gave dete ction limits of about 15-40 ng/L and 0.7-5 ng/L (7.5-mL samples), respectiv ely, for a series of NP-pesticides. (C) 2000 John Wiley & Sons, Inc.