Method for detecting hydrocarbons in soil

Details Method for detecting hydrocarbons in soil Method for detecting hydrocarbons in soil

1998-01-20

1999-07-27

Pyon, Harold Y.

Chemistry: analytical and immunological testing

Geochemical, geological, or geothermal exploration

For petroleum oils or carbonaceous minerals

436 25, 436 27, 436 28, 436 40, 436 60, 436139, 422 681, 73 6144, 7386312, G01N 3324, G01N 3328

Patent

active

059289503

ABSTRACT:
The presence of hydrocarbons in soil is detected by immersing a soil sample in a water-miscible solvent capable of dissolving the hydrocarbons to extract hydrocarbons from the soil into the solvent. An aqueous developer is mixed into the solvent to produce a test mixture. The turbidity of the test mixture is observed to determine the presence of hydrocarbons in the soil. The aqueous developer may contain at least 0.5% salt, e.g., at least 1%, preferably 5% salt, and an emulsifier. Turbidity may be measured quantitatively by measuring light scattered at 90.degree. to a test light beam or by visual comparison to a reference scale.

REFERENCES:
patent: 3746511 (1973-07-01), Stookey et al.
patent: 4343897 (1982-08-01), Neumann et al.
patent: 4980295 (1990-12-01), Udy
patent: 5155546 (1992-10-01), Balsam et al.
patent: 5181428 (1993-01-01), Chriswell
patent: 5756357 (1998-05-01), Wright et al.

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