Selective and non‐selective sampling from precolumn separations—with emphasis on the sampling of aqueous solutions

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Abstract
Various methods of gas chromatographic analysis at high resolution and low detection limits in aqueous solutions are described with regard to sampling techniques, column technology, and the application of coupled pre‐columns, also including multidimensional methods. Immobilized polyethylene glycol (Carbowax 20 M) columns have also been produced and used successfully.