Capillary gas chromatographic analysis of trichlorfon in dosed feed formulations.
A method was developed for the analysis of trichlorfon as the intact molecule from feed formulations of the chemical. The method involved isolation of trichlorfon by a simple extraction procedure. Subsequent detection and quantitation of the trichlorfon was by gas chromatography with a DB-1 fused-silica wide-bore capillary column and flame photometric detection. Automated on-column injections were performed. The method was linear in the range 5-75 ng injected on-column and had an average recovery of 86%. The limit of detection for trichlorfon in feed was 1 ppm. The applicability of the method was tested by determining the stability of trichlorfon over a 21-day period in a feed blend of trichlorfon at the 50-ppm concentration level. Mass spectrometric analyses were performed to confirm that trichlorfon could be quantitated as the intact molecule.
Cox
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Midwest Research Institute, Kansas City, Missouri 64110.
Timmons
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Ridlen
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D000821:Animal Feed / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods*; D014236:Trichlorfon / Q000032:analysis*
D014236:Trichlorfon