140 Organic compounds in soils, sediments & sludges
0.5
(a)
Single (Volts)
Single (V)
Single (Volts)
Single (Volts)
0.4
NP1EO
NP1EO
0.007
0.006
0.005
0.004
0.003
0.002
0.001
0.000
NP2EO
NP2EO
NP1EO
NP2EO
NP1EO
NP2EO
NP
iii
iii
ii
i
ii
i
ii
NP
NP
NP
0.3
0.2
0.1
(b)
0
12.5
12.5
0.6
0.5
0.4
0.3
0.2
0.1
0
0.45
0.35
0.25
0.15
4
6
8
1 0
1 2
1 4
1 6
1 8
2 0
0.05
(c)
12
14
16
18
20
14.5
14.5
16.5
16.5
t (min)
t (min)
t (min)
t (min)
18.5
18.5
20.5
20.5
Figure 6.2 Comparative chromatograms of: (a) Regenerated USE extracts of clay spiked at a level of
0.5 µg g
−1 : (i) MeOH as extractant; (ii) DCM as extractant. Inset: Expand chromatograms
of USE extract of clay blank samples: (i) MeOH as extractant, (ii) DCM as extractant.
(b) (i) Direct injection of standard mixture, concentrations: NP1EO 0.28 µg mL
−1 , NP2EO
0.29 µg mL
−1 , NP 0.22 µg mL
−1 , (ii) Regenerated USE extractant of clay spiked at a level
of 500 µg g
−1 , with MeOH: DCM (1:1) as extractant; (iii) Regenerated USE extract of clay
spiked at a level of 500 µg g
−1 , with MeOH: EtAc (1:1) as extractant. (c) (i) Direct injection of standard: NP1EO 0.64 µg mL
−1 , NP2EO 0.39 µg mL
−1 , (ii) USE-EtAc on Jiménez
brook drainage I (2.5 g/25 mL; 10 mL/0.4 mL), (iii) Jiménez brook drainage II (10 g/100 mL;
15 mL/0.5 mL).
Reprinted from E.R. Ale et al, International Journal of Environmental Analytical Chemistry, 2009,
89, 1005, © 2009,Taylor and Francis [96].