Table 3. ComparisonbetweenGC-TID and
Method 8095 forNG in extracts ofwipe
samples of 120-mmmortar fins.
NG (mg/L)
Sample location
GC-TID
Method 8095
FinA
Stem exterior
0.29
0.26
Stem interior
2.3
2.0
Between tail fins
0.12
0.19
Bottom interior
1.2
0.92
FinB
Stem exterior
10
11
Stem interior
3.7
2.5
Between tail fins
7.2
4.3
Bottom interior
2.0
1.7
Method blank
0.00
0.0035
Table 4. Sample extract dilutions based on colorimetric screening and com-
parisonbetweenGC-TID andMethod8330 results for the analysis of soil
extracts and soil sample replicates. TheGC-TIDwas calibrated over a
range of 0.5 to 50mg/L.Only those analyteswith the highest concentrations
are presented in the table. Several of these samples also contained 2,4-DNT
andTNB, and one contained tetryl.
Colorimetric
screening dilutions TNT (mg/kg)
RDX (mg/kg)
HMX (mg/kg)
1st Spray 2nd Spray
TID
HPLC
TID
HPLC
TID
HPLC
Soil sample extracts
1.
1:10*
1:100
690
640
480
517
<120
<30
2.
ND**
1:10
<0.5
<0.5
<0.5
<0.5
71
77.9
3.
ND
ND
52
51.5
<0.5
0.18
<2.0
<1.5
4.
ND
ND
<0.5
0.12
<0.5
0.052
<2.0
<1.0
5.
1:10
1:10
630
642
73
53.4
23
37
6.
1:1000
1:10
12000 11700
<10
<60
<100
<300
Soil sample splits†
7.
ND
1:10
<0.5
<0.5
<0.5
<0.5
250
180
8.
ND
1:10
<0.5
<0.5
<0.5
<0.5
220
210
9.
1:1000
ND
18000 23000
<50
<50
<200
<2
10. 1:10
1:100
110
120
2100
2300
260
260
11. 1:10
1:100
76
76
1000
1100
200
180
12. 1:10
ND
81
84
11
7.1
<20
<2
13. ND
ND
1.0
0.9
100
110
20
15
14. 1:10
1:100
170
300
3500
4100
280
400
*Dilutionmade based on colorimetric screening
**ND – no dilutionnecessary
†Samples from theEnvironmental TechnologyVerificationProgram. HPLC
analysis of sample splitswere performed by a reference laboratory.
