A Comparison of the Validity of Gas Chromatography– Mass Spectrometry and Liquid Chromatography– Tandem Mass Spectrometry Analysis of Urine Samples for Morphine, Codeine, 6-Acetylmorphine, and Benzoylecgonine

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Journal of Analytical Toxicology, Vol. 33, Iss. 8, 2009-10 ,pp. : 398-408

Oxford University Press

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Extraction of Benzoylecgonine (Cocaine Metabolite) and Opiates (Codeine and Morphine) from Urine Samples Using the Zymark RapidTrace™

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Journal of Analytical Toxicology, Vol. 20, Iss. 7, 1996-11 ,pp. : 587-591

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Urinary Excretion of Codeine and Morphine following the Administration of Codeine-Containing Cold Syrup

By Chang Ber-Lin   Huang Min-Kun  

Journal of Analytical Toxicology, Vol. 24, Iss. 2, 2000-03 ,pp. : 133-139

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Evaluation of Analytical Procedures for Urinary Codeine and Morphine Measurements

By Lin Zhen   Lafolie Pierre   Beck Olof  

Journal of Analytical Toxicology, Vol. 18, Iss. 3, 1994-05 ,pp. : 129-133

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Storage Temperature Effect on the Stability of Morphine and Codeine in Urine

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Journal of Analytical Toxicology, Vol. 19, Iss. 5, 1995-09 ,pp. : 275-280

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