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Evidence of morphine in urine samples


, : Evidence of morphine in urine samples. Zeitschrift fuer Rechtsmedizin 95(2): 85-96

In TLC screenings of 335 urine samples taken because of suspicion of heroin consumption, positive evidence of morphine was found in about 50% of the cases, which was confirmed without exception by gas chromatography-mass spectrometry. In 66% of the positive cases, morphine and codeine were found; in about 31% only morphine was found, and the median value of 0.4 mg/l free morphine and 1.0 mg/l conjugated morphine was considerably lower than in the whole collection of samples. Comparison of the codeine/morphine quotients (Q), especially the free bases, proves that the groups of heroine/morphine or codeine consumers can be distinctly differentiated. The critical conditions of the conjugated bases worked out by Dutt et al. (1983) proved to be right. Using the equation Qf < 0.5 .sqroot.c, a boundary condition for the free flare bases can also be developed, which is dependent on the sum of the codeine and morphine concentrations and which proves heroin/morphine consumption with 98% certainty.

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