Table A1 (cont'd). Comparison of results for direct analysis (Dir) with those
using salting-out (SOE), cartridge SPE (SPE-C) and membrane SPE (SPE-M) for
groundwater samples from NSWC.
Concentration (g/L)
Sample
Type
HMX
RDX
TNB
DNB DNA
TNT
24D
4A
2A
13
Dir
SOE
SPE-C
SPE-M
14
Dir
13
SOE
5.98
SPE-C
12.0
SPE-M
11.6
15
Dir
SOE
SPE-C
SPE-M
16
Dir
40
SOE
0.58
28.7
0.04
0.39
0.13
SPE-C
0.77
33.8
0.03
0.43
0.17
SPE-M
0.66
32.7
0.03
0.44
0.22
17
Dir
SOE
SPE-C
SPE-M
18
Dir
165
58
9
7
SOE
141
39.1
0.80
0.96
8.5
5.62
SPE-C
152
44.4
0.93
0.88
9.5
7.01
SPE-M
138
40.9
0.90
0.9
99.3
6.03
19
Dir
173
76
17
59
54
SOE
172
69.5
2.6
23.1
1.20
65.2
56.4
SPE-C
142
75.6
0.11
2.5
20.9
1.08
57.7
50.5
SPE-M
136
72.7
0.11
2.4
20.3
1.23
55.0
48.0
20
Dir
SOE
SPE-C
SPE-M
21
Dir
252
157
5
110
47
65
SOE
227
132
6.62
0.30
102
42.6
56.5
SPE-C
238
146
6.90
0.33
104
48.0
63.5
SPE-M
226
141
6.45
0.31
102
47.0
61.8
22
Dir
218
40
SOE
201
35.9
2.20
1.90
SPE-C
203
36.5
2.74
2.24
SPE-M
199
35.8
2.78
2.08
23
Dir
SOE
SPE-C
SPE-M
24
Dir
SOE
2.15
7.54
SPE-C
2.47
8.91
SPE-M
2.34
8.84
25
Dir
SOE
SPE-C
0.59
SPE-M
0.63
14
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