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Determination of Cr(VI) in potable water samples after selective preconcentration on oxalate form of Dowex-1 and electro thermal atomic absorption ... [An article from: Analytica Chimica Acta]
Book Details
PublisherElsevier
ISBN / ASINB000RR3IXC
ISBN-13978B000RR3IX3
MarketplaceUnited Kingdom 🇬🇧
Description
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
A method for preconcentration of Cr(VI) from potable water samples was developed using oxalate form of Dowex-1. The resin was found to adsorb Cr(VI) selectively in presence of Cr(III). The percentage recovery (adsorption and elution) of Cr(VI) from water samples was 98.0+/-1.0. The leaching of adsorbed Cr due to the reduction of Cr(VI) to Cr(III) reported earlier, on chloride form of Dowex-1, as a result of oxidation property of Cr(VI) on organic resins has not been observed. The method has been applied for the separation and preconcentration of Cr(VI) from Cr(III) in potable water samples. The adsorbed Cr(VI) was eluted using 0.8M HNO"3. The measurements were carried out using ET-AAS. The method has been applied for the determination of Cr(VI) in two synthetic water samples, and four real samples. The R.S.D. of the procedure was ~3% at 10ngmL^-^1 and ~25% at 0.3ngmL^-^1. The limit of detection of the method was 0.027ngmL^-^1 based on signal corresponding to 0.0044 AU with a 25-fold preconcentration.
Description:
A method for preconcentration of Cr(VI) from potable water samples was developed using oxalate form of Dowex-1. The resin was found to adsorb Cr(VI) selectively in presence of Cr(III). The percentage recovery (adsorption and elution) of Cr(VI) from water samples was 98.0+/-1.0. The leaching of adsorbed Cr due to the reduction of Cr(VI) to Cr(III) reported earlier, on chloride form of Dowex-1, as a result of oxidation property of Cr(VI) on organic resins has not been observed. The method has been applied for the separation and preconcentration of Cr(VI) from Cr(III) in potable water samples. The adsorbed Cr(VI) was eluted using 0.8M HNO"3. The measurements were carried out using ET-AAS. The method has been applied for the determination of Cr(VI) in two synthetic water samples, and four real samples. The R.S.D. of the procedure was ~3% at 10ngmL^-^1 and ~25% at 0.3ngmL^-^1. The limit of detection of the method was 0.027ngmL^-^1 based on signal corresponding to 0.0044 AU with a 25-fold preconcentration.
