Page 40 - Multidimensional Chromatography
P. 40
30 Multidimensional Chromatography
Figure 2.9 (a) Liquid chromatogram (UV detection at 220 nm) obtained after initial sample
enrichment (10 ml of water). At the point indicated, shortly before the content of the sample
loop was completely transferred, the injection valve was switched, thus starting elution.
The atrazine fraction is marked. On the left, part of the chromatogram of another tap water
sample spiked with 100 ppt of atrazine is shown. (b) Gas chromatogram of tap water spiked
with 100 ppt and 15 ppt of atrazine. Reprinted from Journal of Chromatography A, 473,K.
Grob and Z. Li, ‘Coupled reversed-phase liquid chromatography–capillary gas chromatogra-
phy for the determination of atrazine in water’, pp. 423–430, copyright 1989, with permission
from Elsevier Science.
