Direct aqueous injection with electron-capture detection (DAI-ECD) is of increasing interest for the determination of halocarbons in water in the 0.01-10 ppb range. It is particularly useful for very volatile halocarbons that may be obscured by a solvent or by solvent byproducts in the course of determination with solvent extraction or with closed-loop stripping. Owing to its simplicity and its straightforward basis of quantification, it also compares favourably with direct headspace analysis. More conclusive information is presented concerning technical details of the method, particularly concerning the column. The chromatographic conditions and the detection have been further refined, resulting in substantially lowered detection limits. The use of DAI-ECD for heavier halocarbons is described. © 1984.
Grob, K. (1984). Further development of direct aqueous injection with electron-capture detection in gas chromatography. Journal of Chromatography A, 299(C), 1–11. https://doi.org/10.1016/S0021-9673(01)97817-3