2. ENVIRONMENTAL ChEMISTRy & TEChNOLOGy 2.1. Lectures

Chem. Listy, 102, s265–s1311 (2008) Environmental Chemistry & Technology
the mixture of SAs at 0.25 and 2.5 ng ml –1 and enriched and
analyzed by this system. The results are listed in Table II.
Table II
Recoveries of SAs spiked water samples (n = 3)
Sulfonamides Spiked [ng ml –1 ] Recovery [%]
SMX
SnA
SDZ
SMR
SGn
SDM
0.25 57 ± 5.2
2.5 55 ± 6.4
0.25 74 ± 7.3
2.5 73 ± 6.8
0.25 82 ± 4.3
2.5 77 ± 3.7
0.25 58 ± 5.4
2.5 56 ± 7.6
0.25 93 ± 4.1
2.5 88 ± 6.9
0.25 87 ± 2.5
2.5 79 ± 5.3
The chromatogram of the river water sample spiked with
SAs is shown in Fig. 1.
Conclusions
The HPLC method with fluorescence detection characterized
by a good reliability for quantitative determination of
six different kinds of SAs from environmental samples has
been developed. The results showed that MWCnTs could be
used as a potent SPE sorbent for SAs.
This work has been supported by the Natio-nal Authority
for Scientific Research of Romania, CEEX project no.
62/2006.
s453
Fig. 1. SPE-LC-FL chromatogram of river water sample
spiked with 2.5 ng ml –1 of each compound. (1) SMx; (2) SNA; (3)
SDZ; (4) SMR; (5) SGN; (6)SDM
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