Abstract
A fully automatable method for determining atrazine in water is described, based on enrichment of the atrazine from 10 ml of water on a small ODS liquid chromatographic column, desorption with methanol-water (60:40) + 5% 1-propanol and transfer to a gas chromatograph by concurrent eluent evaporation using a loop-type interface. The total analysis time is 35 min with a detection limit of ca. 3–5 ppt. Concurrent eluent evaporation of aqueous eluent mixtures suffers from a large temperature difference between transfer and elution of the first sharp peaks. On transfer at 112°C, the atrazine peaks were perfectly shaped only when eluted at about 250°C.
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