Sequential Voltammetric Determination of Chromium, Thallium, Cadmium, Lead, Copper and Antimony in Saline Hemodialysis Concentrates using Electrolyte pH Gradient
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چکیده
A determinação sequencial de cromo, tálio, cádmio, chumbo, cobre e antimônio em concentrados polieletrolíticos para hemodiálise (DCs) é apresentada. Cromo foi determinado usando voltametria adsortiva de redissolução catódica e tálio, cádmio, chumbo, cobre e antimônio por meio de voltametria de redissolução anódica. O novo método desenvolvido para testar estas amostras se baseia no efeito do gradiente de pH do eletrólito na resposta voltamétrica. Os limites de detecção variaram de 0,03 mg L-1 para cádmio a 0,27 mg L-1 para cobre. Recuperações das amostras variaram de 92,0 a 117,5%. Este método foi aplicado para a análise de DCs comerciais, nos quais as concentrações encontradas dos analitos variaram de 0,16 mg L-1 para antimônio até 140,00 mg L-1 para cobre. Interferências e método de referência são discutidos.
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تاریخ انتشار 2011