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Coupled HPLC with HRGC 33
delivery unit (SDU) pump and a syringe pump) and a GC system equipped with a solvent-vapour exit (SVE), an MS instrument detector, a reten-
two pumps (a solvent- ‘Analysis of
725, A. J. H. Louter et al.,
Schematic representation of an on-line SPE–GC system consisting of three switching valves (V1–V3),
a retaining precolumn and an analytical column. Reprinted from Journal of Chromatography, A
with permission from Elsevier Science. microcontaminants in aqueous samples by fully automated on-line solid-phase extraction–gas chromatography–mass selective detection’,
copyright 1996,
Figure 2.12 tion gap, pp. 67–83,
