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  • Title: Collaborative study of gas-liquid chromatographic determination of methaqualone in pharmaceutical and clandestine preparations.
    Author: Hanel HF.
    Journal: J Assoc Off Anal Chem; 1977 Jul; 60(4):935-9. PubMed ID: 561051.
    Abstract:
    Eight laboratories collaboratively studied a procedure for the quantitative determination of methaqualone. HC1 in pharmaceutical and clandestine preparations. Methaqualone is extracted from an aqueous bicarbonate solution into chloroform and quantitated by gas-liquid chromatography on a 3% OV-1 column. Tetraphenylethylene is used as an internal standard. Two commerical preparations and 4 sample mixtures prepared by the author were studied. Recoveries for the 4 prepared samples ranged from 100.0 to 102.6%, and the coefficients of variation ranged from 1.58 to 4.15% for the 6 samples studied. The method has been adopted as official first action.
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