EPA Method 8515

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EPA Method 8515:
COLORIMETRIC SCREENING METHOD FOR TRINITROTOLUENE (TNT) IN SOIL

Summary:
Test kits are commercially available for this method. The manufacturer's directions should be followed. In general, the method is performed using an extract of a soil sample. The sample is treated with color-change reagents and is read in a portable spectrophotometer. The colorimetric nature of the test is based on the visual detection of the reaction product that is formed when polynitroaromatic compounds react with acetone by ketone substitution in the presence of base. This substitution product is measured at 540 nm using a spectrophotometer. The concentration of TNT in an unknown sample is determined by evaluating the intensity of the color that is developed.

Scope:
Method 8515 is a procedure for screening soil samples to determine when 2,4,6- trinitrotoluene (TNT, CAS No. 118-96-7) is present at concentrations above 1 ppm.

Report Number:
SW-846 Ch 4.5