Research Article

Selective Extraction of Organic Contaminants from Soil Using Pressurised Liquid Extraction

Table 1

Effect of various sorbent types on the multiresidual extraction of PAHs, chlorpyrifos, phenol, pentachlorophenol, and sterols from spiked soil.

AnalyteRecovery % (RSD %), ( 𝑛 = 3 )
SilicaAluminaFlorisil
5 g10 g5 g10 g5 g10 g
Fraction number
1st2nd1st2nd1st2nd1st2nd1st2nd1st2nd

Naphtalene
Acenaphtalene
acenaphthene
Fluorene
Pyrene
BaA
BaP
Chlorpyrifos
Phenol
PCP
Coprostanol
Cholesterol
Stigmasterol
Stigmastanol
87.1 (8.8)
91.6 (11.2)
94.2 (2.1)
94.2 (3.4)
96.2 (2.8)
93.9 (10.4)
95.8 (13.2)
102.9 (1.7)
nd
106.2 (4.2)
nd
nd
nd
nd
nd
nd
nd
nd
nd
nd
nd
nd
91.9 (2.1)
nd
100.5 (2.1)
100.1 (11.1)
97.5 (3.0)
93.7 (5.0)
83.2 (9.0)
87.2 (12.4)
87.8 (9.5)
94.8 (3.3)
91.3 (5.1)
67.4 (10.0)
58.3 (2.4)
22.8 (10.1)
n.a
n.a
nd
nd
nd
nd
nd
nd
nd
nd
nd
31.2 (4.8)
28.3 (3.4)
88.0 (4.7)
n.a
n.a
103.3 (7.2)
103.9 (0.6)
99.6 (5.8)
99.3 (3.3)
87.0 (4.7)
97.4 (2.4)
102.6 (1.6)
96.6 (1.1)
96.2 (1.6)
65.3 (3.4)
53.2 (5.8)
106.8 (8.5)
nd
70.4 (9.6)
nd
nd
nd
nd
nd
nd
nd
nd
9.6 (4.0)
36.9 (8.5)
53.3 (11.9)
nd
90.9 (2.9)
nd
86.8 (1.3)
91.7 (0.5)
94.5 (3.5)
94.9 (1.5)
87.8 (0.6)
106.9 (4.6)
104.8 (1.3)
90.6 (3.6)
86.2 (6.8)
44.1 (11.7)
12.3 (4.2)
27.8 (1.6)
nd
24.5
nd
nd
nd
nd
nd
nd
nd
nd
16.5 (4.0)
52.4 (9.2)
92.8 (1.6)
22.9 (0.1)
101.7 (3.5)
nd
88.3 (5.4)
95.2 (8.8)
94.7 (4.2)
94.9 (3.9)
73.9 (12.9)
89.1 (5.6)
96.8 (4.1)
102.5 (0.7)
96.9 (1.9)
98.8 (0.3)
114.0 (4.0)
104.7 (10.4)
nd
68.7 (10.2)
44.2 (6.1)
36.1 (8.0)
nd
39.1 (3.6)
nd
nd
nd
nd
nd
nd
nd
nd
98.2 (6.3)
nd
32.5 (0.3)
50.4 (4.1)
98.9 (5.0)
53.1 (5.2)
70.4 (7.8)
80.1 (6.2)
84.7 (6.8)
90.0 (6.0)
92.7 (2.7)
99.5 (4.0)
106.0 (9.3)
106.8 (8.5)
nd
36.3
27.7 (5.0)
18.0 (9.2)
nd
19.0 (4.1)
nd
nd
nd
nd
nd
nd
nd
nd
89.6
nd
50.7 (0.8)
72.6 (0.9)
102.4 (2.3)
75.0 (0.5)

Fraction 1: 𝑛 -hexane.
Fraction 2: methanol (MeOH).
n.a: not available (not tested).