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| Titel: |
A rapid GC method of monitoring Mesurol {4-(methylthio)-3,5-xylyl-N-methyl carbamate} and its sulfoxide and sulfone metabolites and their persistence in lowbush blueberries |
| Auteur: |
Greenhalgh, R. Wood, G. W. Pearce, P. A. |
| Verschenen in: |
Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes |
| Paginering: | Jaargang 12 (1977) nr. 4 pagina's 229-244 |
| Jaar: |
1977 |
| Inhoud: |
A facile analytical procedure was developed for determining Mesurol {4-(methylthio)-3,5-xylyl-N-methyl carbamate} and its oxidation products in blueberries. It involved blending with acetone, partition with chloroform and derivatization with trifluoroacetic anhydride and quantitation by gas chromatography/flame photometric detector (GC/FPD). The method showed good recoveries for Mesurol and its sulfoxide at the 0.1 ppm level and Mesurol sulfone at the 0.3 ppm level with a 25 g sample. It was applied to monitor levels of the insecticide and its oxidation products on field-treated blueberries. The sensitivity of the method may be increased 5-fold by the inclusion of a clean-up step. The optimal conditions for the detection of Mesurol TFA by the modified Bendix sulphur/phosphorus emission detector operating in the sulphur mode required an oxygen/hydrogen ratio of 0.38, for a column flow of 60 ml/min. The minimum detectable amounts of the TFA derivatives of Mesurol, its sulfoxide and sulfone were calculated as 1.3, 2.3 and 5.8 × 10-11 g/sec, respectively. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 1 van 6 gevonden artikelen
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