This application successfully demonstrates high-throughput automated environmental anal. of herbicides at trace/ultratrace levels using an online, integrated, turbulent-flow solid-phase extraction and chromatog. system. Compared with the corresponding manual method, run times and sample volumes are dramatically reduced (45 min vs. 765 min and 1.8 mL vs. 250 mL-a reduction of 94% and 99% , resp.). The reduction in sample size also significantly reduces the time and effort required for sample collection and transport. Loss of sensitivity resulting from the use of smaller samples and higher flow rates is more than compensated for by MS-MS detection capabilities of an ion trap mass spectrometer (LOQ to 0.2 ppb vs. 2-10 ppb for the current U.S. EPA (manual) method). Recovery and reproducibility are acceptable under U.S. EPA criteria, while sensitivity and specificity are increased. Lower recoveries for some analytes in dirty matrixes, which may be due to matrix effects and suppression of ionization, are also partially compensated for by the increase in specificity afforded by MS-MS. Instrument downtime is held to a min. since the method is designed to prevent fouling of the mass spectrometer or anal. column by dirty samples.