2004
DOI: 10.1590/s0103-50532004000200024
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Determination of cadmium by flame-atomic absorption spectrometry after preconcentration on silica gel modified with cupferron

Abstract: Este trabalho descreve um método para a pré-concentração de cádmio com sílica gel modificada com cupferron e sua determinação por espectrometria de absorção atômica com chama. O efeito do pH, a quantidade do material adsorvente, a concentração de eluente, volume da amostra e quantidade do analito adsorvido foram otimizados. O efeito de interferentes foi avaliado para diversos íons mostrando que a extração de cádmio somente é afetada por Zn(II) e Cu(II), dependendo da concentração dos mesmos, mas pode ser minim… Show more

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Cited by 40 publications
(26 citation statements)
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References 10 publications
(14 reference statements)
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“…The chelating resins can be used in flow injection system with various detection methods like FAAS, ICP-AES, spectrophotometry, chemiluminescence and ICP-MS etc [26].There are various chelating resins have recently been used such as polyurethane foam [27][28][29][30][31][32][33][34][35], cellulose, silica gel [36][37][38][39][40][41][42], alumina [43][44][45][46][47][48], chitosan [49][50][51], carbon active [52] and polymeric resins like Amberlite etc. Amberlite XAD resins widely used to develop several chelating materials for preconcentration procedures due to its good physical and chemical properties such as porosity, high surface area, durability and purity.…”
Section: Applications Of Chelating Resins Based On Amberlite Xad mentioning
confidence: 99%
“…The chelating resins can be used in flow injection system with various detection methods like FAAS, ICP-AES, spectrophotometry, chemiluminescence and ICP-MS etc [26].There are various chelating resins have recently been used such as polyurethane foam [27][28][29][30][31][32][33][34][35], cellulose, silica gel [36][37][38][39][40][41][42], alumina [43][44][45][46][47][48], chitosan [49][50][51], carbon active [52] and polymeric resins like Amberlite etc. Amberlite XAD resins widely used to develop several chelating materials for preconcentration procedures due to its good physical and chemical properties such as porosity, high surface area, durability and purity.…”
Section: Applications Of Chelating Resins Based On Amberlite Xad mentioning
confidence: 99%
“…The modified electrodes are investigated by electrochemistry and x-ray photoelectron spectroscopy (XPS) [6], [7]. Important papers about Cd(II) ion analysis were evaluated using spectrophotometric methods and flame-atomic absorption spectrometry [8], [9]. Nonetheless, the tecniques have difficult methods to eliminate the excipients.…”
Section: Introductionmentioning
confidence: 99%
“…6,7 There are many methods for separation and preconcentration, such as ion-exchange, 8 liquid-liquid extraction, 9 coprecipitation 10,11 and solid-phase extraction. 12,13 Among these, solid phase extraction is commonly used, and is a very favorable technique. 14 In preconcentration studies performed by utilizing solid-phase extraction for trace metal ions, many natural and synthetic sorbent materials are used as the column filling material.…”
Section: Introductionmentioning
confidence: 99%
“…14 In preconcentration studies performed by utilizing solid-phase extraction for trace metal ions, many natural and synthetic sorbent materials are used as the column filling material. Among these, silica gel, 5,12 cellulose, 15,16 activated carbon, 17,18 Amberlite XAD resins, 19,20 biosorbents 21 and various polymers 22 are the most widely used support materials. It is necessary that the retention of metal ions on a solid sorbent for preconcentrating purposes occurs when using a solid-phase extraction procedure.…”
Section: Introductionmentioning
confidence: 99%