New halogen-specific detector applied to the analysis of chlorinated fattyacids

A new halogen-specific detection method (XSD) was tested for determination of chlorinated fatty acids in marine biota. In XSD, an increased emission o f ions and electrons is caused by the high-temperature combustion of haloge n-containing compounds. The detection limit of methyl dichlorooctadecanoate and the selectivity at a reactor temperature of 900 degreesC match those o f electrolytic conductivity detection (ELCD). The relative standard deviati on is less than 11% for greater than or equal to0.2 ng methyl dichlorooctad ecanoate. An XSD chromatogram of a complex sample, chlorinated fatty acid m ethyl esters liberated from fish lipids, agreed with a previously obtained ELCD chromatogram. (C) 2001 Elsevier Science B.V. All rights reserved.