Determination and study on degradation dynamics of fungicide validamycin a residue in soil using pre-column derivatization and capillary gas chromatography View Full Text


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Article Info

DATE

2009-07-29

AUTHORS

Pengjun Xu, Shuren Jiang, Bu Tao, Hongyan Zhang

ABSTRACT

A method for determining validamycin A residue in soil utilizing pre-column derivatization and gas chromatography was developed. Validamycin A was extracted from soil samples by 10% ammonia solution without additional clean-up step and then was derivatized with N,O-bis(trimethylsilyl)acetamide. Derivative of validamycin A was analyzed by gas chromatography on a capillary column. The method showed good linearity in the range of 4.4–142.0 mg/L (r2 = 0.9997). The average recoveries were 98.82 and 98.61% with relative standard deviations 1.95 and 2.87% at spiking levels 0.2 and 2.0 mg/kg, respectively. The limit of detection of validamycin A in soil was 0.2 mg/kg. The degradation dynamics of validamycin A in soil was studied. The result shows that validamycin A degradation in soil in the open field in Beijing suburb can be described by the equation c = 6.6109e−0.0196t; the half-life is 35.4 h. More... »

PAGES

818-822

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URI

http://scigraph.springernature.com/pub.10.1134/s1061934809080085

DOI

http://dx.doi.org/10.1134/s1061934809080085

DIMENSIONS

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