Electron capture gas chromatographic analysis of DDA: Utilization of 2-chloroethanol derivative

Summary

This paper reports the use of the 2-chloroethanol derivative in the electron capture gas chromatographic analysis of DDA. The efficiency of conversion of DDA to the 2-chloroethanol derivative was 91.5±1.0%. The utilization of a silica gel column for clean up prior to electron capture analysis is discussed and the elution pattern for the 2-chloroethanol derivative is given with a recovery of 97.3±0.4%. The 2-chloroethanol derivative is 3.7±0.1 times more responsive to electron capture detection than the methyl ester of DDA and produces a retention time which separates the DDA from other chlorinated hydrocarbon pesticides which might interfere with the analysis.