4.4 Article

Determination of hexaconazole in surface water samples from river and the sea by liquid chromatography-electrospray tandem mass spectrometry

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BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
卷 72, 期 1, 页码 149-154

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TAYLOR & FRANCIS LTD
DOI: 10.1271/bbb.70513

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hexaconazole; liquid chromatography/electrospray tandem mass spectrometry (LC-MS/MS); biodegradation; river water; sea water

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A simple and selective method was developed for determining the concentration of hexaconazole in river and sea water samples by using liquid chromatography/tandem mass spectrometry with an electrospray ionization interface in the positive ion mode and selective reaction monitoring mode. Trace amounts of hexaconazole were collected in a Sep-Pak Plus tC18 cartridge that was eluted with methanol. The detection limit for hexaconazole was 6 ng/l. The recovery of a standard aqueous solution containing 1 mu g/l was 96%. The recovery of hexaconazole in the river and sea water samples was 95% and 90%, respectively. Hexaconazole was not detected in the sea water samples. Trace peaks of hexaconazole were found in the river water samples, the concentration being less than 6 ng/l in all cases. The biological degradation of hexaconazole was tested by using river water. No degradation of hexaconazole was apparent in river water incubated at 20 degrees C for 3 weeks.

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