Use of a temperature programmed injector with a packed liner for direct water analysis and on-line reversed phase LC-GC

A system is described that allows the introduction of large vols. of water samples in capillary gas chromatog. (GC). Water elimination is carried out in the solvent split mode in a PTV injector with a packed liner. Two ways of sepg. water and analytes, i.e., evaporative and non-evaporative, (solid-phase extn.) are compared. Sampling in the solid-phase extn. mode is favorable both in terms of recovery as well as with regard to sampling time. Quant. recovery is obtained for priority pollutants ranging in volatility from dimethylphenol to phenanthrene. Losses occur for more volatile compds., but even for these compds. the repeatability of the recoveries remains acceptable. Water samples up to >=1 mL of water can be directly analyzed. The detection limits are in the sub-ppb rang