trations of HMX, although a thinner film may have
ardous waste characterization. We spiked samples
at 5 and 50 g/kg because the ECD response fac-
allowed this analyte to elute intact.
tors differ substantially for these analytes (Fig. 4),
being significantly higher for the di-and
Spike recoveries and MDL
We spiked two blank matrices to determine de-
trinitroaromatics. Each matrix had interferences
tection limits for the analytes of interest for haz-
(Fig. 5) that inflated the MDL for some of the
6,000
100 g/kg
3,5-DNA
Standard
5,000
4,000
3,000
2,000
1,000
0
0
5
10
15
Time (min)
Figure 4. GC-ECD chromatogram of calibration standard containing the analytes of interest
for hazardous waste site characterization.
1,200
AEC Soil
Blank
1,000
800
600
400
200
0
0
5
10
15
Time (min)
a) AEC soil, blank.
Figure 5. GC-ECD chromatograms of blank and spiked soils used for determination of method
detection limits and spike recovery.
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