Method for detecting hydrocarbons in water

Details Method for detecting hydrocarbons in water Method for detecting hydrocarbons in water

1998-05-22

2000-09-12

Le, Long V.

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

061176826

ABSTRACT:
The presence of hydrocarbons in water is detected by contacting a water sample with an adsorbent material to extract hydrocarbons from the water sample and then contacting the adsorbent material with a solvent for the hydrocarbons. A developer such as a miscible nonsolvent liquid 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 water sample. The nonsolvent 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.

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