| 10669303 |
Saikia N, Kulshrestha G: New gas chromatographic method for residue determination of dithiopyr in soil, wheat grain and straw. J Chromatogr A. 1999 Dec 24;864(2):351-3.
A gas chromatographic method has been developed for a new pyridine herbicide, dithiopyr, utilising an electron capture detector. The method makes use of a column (10 m x 0.534 mm I.D.; 1 microm film thickness) containing HP-1 with nitrogen as a carrier gas at a flow rate of 15 ml min (-1) at temperatures of 190, 210, 270 degrees C for oven, injector port and detector, respectively. Soil, wheat grain and straw samples fortified with dithiopyr were extracted with acetone-0.2 M HCl (95:5) and cleaned up by partitioning with hexane. The technique has a sensitivity of 0.05 microg ml (-1) and the recovery of dithiopyr from soil, wheat grain and straw ranged between 80 and 99%. |
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