STRUCTURAL ELUCIDATION AND TRACE ANALYSIS WITH COMBINED HYPHENATED CHROMATOGRAPHIC AND MASS-SPECTROMETRIC METHODS - POTENTIAL OF USING HYBRID SECTOR MASS-SPECTROMETRY TIME-OF-FLIGHT MASS-SPECTROMETRY FOR PESTICIDE ANALYSIS

The development of methods for analysis of triazines and their hydroxy metabolites in humic soil samples with combined chromatographic and m ass spectrometric techniques is described. A two-way approach was used for separating interfering humic substances and for performing struct ural elucidation of the herbicide traces. Humic soil samples were extr acted by supercritical fluid extraction and analysed both by HPLC-part icle beam MS and a new MS-MS method. The new MS-MS unit is of the tand em-sector field-time-of-flight-MS type.