Page 51 - Multidimensional Chromatography

Coupled HPLC with HRGC 41

Figure 2.20 Schematic representation of the set-up used for on-line extraction–GC: V1 and
V2, valves; P1 and P2, syringe pumps; L, sample loop; CC flow, countercurrent flow; CT, cold
trap. Reprinted from Journal of High Resolution Chromatography, 16, H. G. J. Mol et al.,
‘Use of open-tubular trapping columns for on-line extraction–capillary gas chromatography
of aqueous samples’, pp. 413–418, 1993, with permission from Wiley-VCH.

Figure 2.21 A gas chromatogram of a sample of river water (2.25 ml) spiked at 5 ppb levels
with: 1, toluene; 2, ethylbenzene; 3, methoxybenzene; 4, p-dichlorobenzene; 5, dimethylphe-
nol; 6, dimethylaniline; 7, chloroaniline; 8, indole; 9, dichlorobenzonitrile; 10, trichlorophe-
nol; 11, dinitrobenzene; 12, trifluranil; 13, atrazine; 14, phenanthrene. Reprinted from Journal
of High Resolution Chromatography, 16, H. G. J. Mol et al., ‘Use of open-tubular trapping
columns for on-line extraction–capillary gas chromatography of aqueous samples’,
pp. 413–418, 1993, with permission from Wiley-VCH.