EPA Method 8440

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EPA Method 8440:
TOTAL RECOVERABLE PETROLEUM HYDROCARBONS BY INFRARED SPECTROPHOTOMETRY

Summary:
Soil samples are extracted with supercritical carbon dioxide using Method 3560. Interferences are removed with silica gel, either by shaking the extract with loose silica gel, or by passing it through a silica gel solid-phase extraction cartridge. After infrared (IR) analysis of the extract, TRPHs are quantitated by direct comparison with standards.

Scope:
Method 8440 (formerly Draft Method 9073) is used for the measurement of total recoverable petroleum hydrocarbons (TRPHs) extracted with supercritical carbon dioxide from sediment, soil and sludge samples using Method 3560.

Report Number:
SW-846 Ch 4.3.4