Table 10. Mean analyte concentrations (pg/mL) in headspace vapor above clay
containing buried U.S. military-grade TNT, at three temperatures and three
moisture levels.
23C
4C
12C
Analyte
Air dry
5.8%
10%
Air dry
5.8%
10%
Air dry
5.8%
10%
6 days
1,3-DNB
<d
0.533
0.457
1,2-DNB
<d
0.290
0.259
2,5-DNT
<d
<0.013
<d
2,4-DNT
<d
<d
<d
3,5-DNT
<d
5.24
4.14
1,3,5-TNB
<d
<d
<d
2,4,6-TNT
<d
<d
<d
15 days
12 days
13 days
1.70
1.19
<d
<d
<d
<d
<d
<d
1,3-DNB
<d
1,2-DNB
<d
0.326
0.221
<d
<d
<d
<d
<d
<d
2,5-DNT
<d
0.090
0.030
<d
<d
<d
<d
<d
<d
2,4-DNT
<d
1.72
0.994
<d
0.800
0.840
<d
<d
<d
3,5-DNT
<d
0.867
0.217
<d
<d
<d
<d
<d
<d
1,3,5-TNB
<d
0.222
0.090
<d
<d
<d
<d
<d
<d
0.442
0.351
<d
<d
<d
<d
<d
<d
2,4,6-TNT
<d
22 days
19 days
20 days
1,3-DNB
<d
1.74
1.60
<d
<0.075
0.080
<d
<d
<d
1,2-DNB
<d
0.279
0.258
<d
0.041
0.036
<d
<d
<d
2,5-DNT
<d
<0.077
0.061
<d
<d
<d
<d
<d
<d
2,4-DNT
<d
3.54
2.75
0.028
0.042
0.063
<d
<d
<d
3,5-DNT
<d
<0.711
0.479
<d
<d
<d
<d
<d
<d
1,3,5-TNB
<d
0.177
0.175
<d
<d
<d
<d
<d
<d
2,4,6-TNT
<d
0.297
0.294
<d
<d
<d
<d
<d
<d
34 days
35 days
36 days
1,3-DNB
<d
2.33
1.92
<d
0.502
0.64
<d
<d
<d
1,2-DNB
<d
0.332
0.274
<d
0.155
0.160
<d
<d
<d
2,5-DNT
<d
0.042
0.049
<d
<d
<d
<d
<d
<d
2,4-DNT
<d
8.04
6.03
0.031
0.069
0.351
<d
<d
<d
3,5-DNT
<d
0.882
0.653
<d
0.052
0.083
<d
<d
<d
1,3,5-TNB
<d
0.169
0.283
<d
<d
<d
<d
<d
<d
2,4,6-TNT
<d
0.207
0.163
<d
<d
<d
<d
<d
<d
63 days
67 days
69 days
1,3-DNB
<d
1.37
1.13
<d
1.12
0.451
<d
<d
<d
1,2-DNB
<d
0.254
0.228
<d
0.178
0.127
<d
<d
<d
2,5-DNT
<d
0.015
0.014
<d
<0.007
<0.012
<d
<d
<d
2,4-DNT
<d
6.05
4.86
0.034
0.432
1.22
<d
<d
<d
3,5-DNT
<d
0.681
0.551
<d
0.125
0.171
<d
<d
<d
1,3,5-TNB
<d
0.195
0.193
<d
<d
<d
<d
<d
<d
2,4,6-TNT
<d
0.129
0.103
<d
<0.012
0.016
<d
<d
<d
112 days
111 days
110 days
1,3-DNB
<d
1.68
1.44
<d
1.34
0.100
<d
<d
<d
1,2-DNB
<d
0.398
0.355
<d
0.169
0.070
<d
<d
<d
2,5-DNT
<d
0.013
0.013
<d
0.009
0.008
<d
<d
<d
2,4-DNT
<d
8.98
7.46
<d
1.00
1.13
<d
<d
<d
3,5-DNT
<d
1.19
0.994
<d
0.140
0.131
<d
<d
<d
1,3,5-TNB
<d
0.311
0.309
<d
<d
<d
<d
<d
<d
2,4,6-TNT
<d
0.239
0.231
<d
0.025
0.030
<d
<d
<d
173 days
173 days
173 days
1,3-DNB
<d
not done
<d
not done
<d
<d
0.017
1,2-DNB
<d
<d
<d
<d
0.005
2,5-DNT
<d
<d
<d
<d
<d
2,4-DNT
0.010
0.010
0.010
0.026
0.021
3,5-DNT
<d
<d
<d
<d
<d
1,3,5-TNB
<d
<d
<d
0.011
0.016
2,4,6-TNT
0.007
0.007
0.005
0.107
0.047
<d
Values were less than the detection limit.
One replicate had a value greater than the detector maximum signal.
bold
Only values available were greater than the detector maximum signal.
bold
italics
One of the replicate values was less than the detection limit.
italics
Only one replicate was analyzed.
16
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