2011
DOI: 10.1590/s0103-50532011000500003
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Sequential voltammetric determination of chromium, thallium, cadmium, lead, copper and antimony in saline hemodialysis concentrates using electrolyte pH gradient

Abstract: 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 0,2… Show more

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Cited by 10 publications
(9 citation statements)
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“…The adsorption and reaction mechanisms of Cr species with DTPA at mercury electrodes have also been well described in the literature 35. Furthermore, Tl can also be selectively determined using the same complexing electrolyte 22. In this work, other interferences were systematically investigated.…”
Section: Resultsmentioning
confidence: 88%
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“…The adsorption and reaction mechanisms of Cr species with DTPA at mercury electrodes have also been well described in the literature 35. Furthermore, Tl can also be selectively determined using the same complexing electrolyte 22. In this work, other interferences were systematically investigated.…”
Section: Resultsmentioning
confidence: 88%
“…The last step for Sequential Method II was the addition of ammonium acetate to buffer the medium at pH 4.6 for Tl determination. The use of DTPA was also necessary to eliminate interferences from the elements determined in the previous steps (mainly Pb and Cd) 22. Thus, the presence of DTPA was essential due to its complexing effect on several elements (Table 2), which allowed the determination of Tl because of its relatively low formation constant compared to the other interfering elements (e.g., Pb, Cd, Cu) analyzed in the previous proposed steps.…”
Section: Resultsmentioning
confidence: 99%
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“…50 Devido à versatilidade da voltametria e baixa ou inexistente necessidade de tratamento de amostra, diferentes matrizes além das ambientais pertencem ao escopo que podem ser estudadas pela técnica. Amostras como composições farmacêuticas, [51][52][53][54] 10 -100 μg L 91 AC = corrente alternada; ASV = voltametria de redissolução anódica; CSV = voltametria de redissolução catódica; CV = voltametria cíclica; DP = pulso diferencial; NI = não informado; SV = voltametria de redissolução; SW = onda quadrada. Tabela 1.…”
Section: Determinação De íOns Metálicos Usando O Hmdeunclassified
“…Ensuring the quality of dialysis water can be a challenge, since each patient is exposed to between 18,000 and 36,000 l of water per year [3], and high water quality is extremely important in order to avoid exposure of these individuals to chemical and microbial contaminants [4]. The literature reports several analytical methods for the detection of metal contaminants, with the aim of minimizing the possibility of patient exposure [5][6][7][8]. However, to the best of our knowledge, there have been no reported studies concerning the detection of pharmaceutical compounds such as diuretics in the water used for dialysis.…”
Section: Introductionmentioning
confidence: 99%