Method for detecting tetrahydrocannabinol in human urine involvi

Details Method for detecting tetrahydrocannabinol in human urine involvi Method for detecting tetrahydrocannabinol in human urine involvi

1988-01-14

1989-06-27

Marantz, Sidney

Chemistry: analytical and immunological testing

Involving an insoluble carrier for immobilizing immunochemicals

436161, 436173, 436175, 436177, 436536, 436804, 436816, 436825, 436901, G01N 33534, G01N 3394

Patent

active

048430200

ABSTRACT:
An improved method for the detection of tetrahydrocannabinol in human urine wherein the pigment melanin is precipitated out of the urine prior to analysis with a solution of nitroferricyanide so that the melanin does not interfere with the analysis. The value attributable to melanin can also be subtracted from the value obtained during the analysis of the urine. The precipitation of melanin prior to analysis or subtraction of the melanin value during analysis greatly reduces the occurrence of false positive test results for persons with dark skin.

REFERENCES:
patent: 4022878 (1977-05-01), Gross
patent: 4353886 (1982-10-01), Lukens

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