Table 6. Most common analytes detected in soils collected from an experimental minefield at Fort Leonard Wood two months after the mines were emplaced. The relative percent differences (%) are shown in parentheses for replicates.

Minefield samples - continued

Figure 6. GC-ECD chromatograms of soil extracts from a minefield sample.

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Table 6. Most common analytes detected in soils collected from an experimental minefield at Fort

Leonard Wood two months after the mines were emplaced. The relative percent differences (%) are

shown in parentheses for replicates.

Concentration (g/kg)

*S: Surface soil.

T1: 2-cm-long core just under surface soil.

T2: Core of soil between T1 and X.

X: 2-cm-long core of soil just above the center of the mine's top surface.

grams obtained on the analytical and confirma-

sufficiently high concentrations for determination

tion column of a soil containing the suite of fre-

by HPLC. For this data set, we compared concen-

tration estimates over 100 g/kg for the amino-

quently detected analytes. The amino-DNTs were

DNTs and over 50 g/kg for 2,4-DNT (Fig. 7). GC

the most frequently detected analytes, with 71

detections of 2-Am-DNT and 61 detections of 4-

concentration estimates were obtained using an

HP 6890 -ECD without dilution of the soils ex-

Am-DNT. In previous comparisons we have made

between GC-ECD and HPLC-UV, we have not had

tracts. Correlation between the two methods for

a sufficient number of samples with analytes at

2,4-DNT was similar to what we have previously

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