Abstract
Dioxin analysis is a demanding analysis that requires high sensitivity, high selectivity and high specificity. Currently, the analytical method of choice is HRGC/HRMS using the peak top method [PT] after extensive column clean-up. An alternative that has been proposed 1,2 is to use mass peak profile [MP], in which a sweep is performed over each ion detected, rather than monitoring the peak top. Using this MP method interferences seen with the standard PT method in the responses of native PeCDDs in a dirty fly ash sample, native TeCDDs in a dirty flue gas sample, and 13C 12-TeCDF in a dirty flue gas and fish samples, were investigated. The method enabled the responses for the interferences to be distinguished from those due to the target compounds, and also enabled tentative identifications of the interfering species.
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