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Determination of 3,4-methylenedioxymethamphetamine (MDMA) in Ecstasy tablets by high performance liquid chromatography with fluorescence detection (HPLC-FD)
José Luiz da Costa*; Estela Regina Pintao; Célia Maria Castro Corrigliano; Osvaldo Negrini Neto
Centro de Exames, Análises e Pesquisas, Instituto de Criminalística, Superintendência da Polícia Técnico Científica do Estado de São Paulo, R. Moncorvo Filho, 410, 05507-060 São Paulo - SP, Brasil
ABSTRACT
This paper describes the development and validation of simple and selective analytical method for determination of 3.4-methylenedioxymethamphetamine (MDMA) in Ecstasy tablets, using high performance liquid chromatography with fluorescence detection. Analysis was performed in a reversed phase column (LiChrospher 100 C18, 150 x 4.6 mm, 5 µm), isocratic elution with phosphate buffer 25 mmol/L pH 3.0 and acetonitrile (95:5, v/v). The method presents adequate linearity, selectivity, precision and accuracy. MDMA concentration in analyzed tablets showed a remarkable variability (from 8.5 to 59.5 mg/tablet) although the tablet weights were uniform, indicating poor manufacturing control thus imposing additional health risks to the users.
Keywords: HPLC; MDMA; drugs of abuse.
INTRODUÇÃO
As drogas sintéticas estão entre as substâncias controladas mais consumidas no ocidente, sendo as principais representantes desta classe a 3,4-metilenodioximetanfetamina (MDMA, Ecstasy), a 3,4-metilenodioxietilanfetamina (MDEA, Eve) e a 3,4-metilenodioxianfetamina (MDA) (Figura 1). Estas substâncias são estruturalmente semelhantes à anfetamina e a algumas fenilaquilaminas de atividade alucinógena. Contudo, a atividade farmacológica destas substâncias não se restringe apenas à simples atividade estimulante ou alucinógena,