Analysis of Metsulfuron-methyl in Soil by Liquid Chromatography/Tandem Mass Spectrometry. Application to a Field Dissipation Study
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- 作者：Rossana Bossi ; Piet Seiden ; S
//pubs.acs.org/images/gifchars/oslash.gif" border="0">ren M. Andersen ; Carsten S. Jacobsen ; and Jens C. Streibig
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：1999
- 出版时间：October 1999
- 年：1999
- 卷：47
- 期：10
- 页码：4462 - 4468
- 全文大小：78K
- 年卷期：v.47,no.10(October 1999)
- ISSN：1520-5118
文摘
An analytical method is described for the extraction of metsulfuron-methyl from soil at sub-partsper billion levels (LOQ = 0.2 
g kg-1). The herbicide was quantitatively determined and identifiedby ESI LC/MS/MS. The method has been applied to a field dissipation study in which metsulfuron-methyl was applied to spring barley at three dosage rates: 4, 8, and 16 g of active ingredient ha-1.The results of 2 years are presented. The dissipation rate of metsulfuron-methyl in topsoil wasvery rapid, with a calculated half-life of 6.5 days. Laboratory mineralization studies with nativesoils in contrast to autoclaved soils indicated that microbial degradation of 14C-labeled metsulfuron-methyl and 14C-labeled 2-amino-4-methoxy-6-methyl-1,3,5-triazine in soil microcosms is an importantfactor for the complete degradation of metsulfuron-methyl in the field. However, the mineralizationrate of the sulfonamide was much higher.Keywords: Metsulfuron-methyl; triazine amine; ESI LC/MS/MS; field dissipation; microbialdegradation; mineralization
g kg-1). The herbicide was quantitatively determined and identifiedby ESI LC/MS/MS. The method has been applied to a field dissipation study in which metsulfuron-methyl was applied to spring barley at three dosage rates: 4, 8, and 16 g of active ingredient ha-1.The results of 2 years are presented. The dissipation rate of metsulfuron-methyl in topsoil wasvery rapid, with a calculated half-life of 6.5 days. Laboratory mineralization studies with nativesoils in contrast to autoclaved soils indicated that microbial degradation of 14C-labeled metsulfuron-methyl and 14C-labeled 2-amino-4-methoxy-6-methyl-1,3,5-triazine in soil microcosms is an importantfactor for the complete degradation of metsulfuron-methyl in the field. However, the mineralizationrate of the sulfonamide was much higher.Keywords: Metsulfuron-methyl; triazine amine; ESI LC/MS/MS; field dissipation; microbialdegradation; mineralization