2. ENVIRONMENTAL ChEMISTRy & TEChNOLOGy 2.1. Lectures

Chem. Listy, 102, s265–s1311 (2008) Environmental Chemistry & Technology
Fig. 2. Influence of a purification procedure – soil B
Fig. 3. Influence of a purification procedure – soil E
soil B, better results were obtained using the first purification
method where the third fraction was the only fraction
analysed. Samples of soil C exhibited a common trend for
lower-molecular-weight PAHs where the method of extract
s460
purification had hardly any effect on the final content in the
given matrix. On the contrary, the second purification method
using two sorbents (silica gel and florisil) was proven optimal
for the PAHs with higher molecular weight.
Conclusions
However, in this context it is important to point out that
the yield of pre-analytical techniques is significantly influenced
by the sample matrix by the way of matrix effects. The
structure and chemical qualities of individual PAH also plays
an important role.
This work has been supported by by the grant given by
Ministry of Education, Youth and Sports of the Czech Republic
no. 6215712402.
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