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KMID : 1059519990430050522
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Journal of the Korean Chemical Society
1999 Volume.43 No. 5 p.522 ~ p.526
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Spectrophotometric Determination of Iron with 2-Hydroxybenzaldehyde-5-nitro-pyridylhydrazone after Separation with Amberlite XAD-7 Nonionic Resin
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Park Chan-Il
Chung Byung-Doo
Jung Duck-Chae
Cha Ki-Won
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Abstract
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2-Hydroxybenzaldehyde-5-nitro-pyridylhydrazone (2HB-5NPH) was synthesized and its application to the spectrophotometric determination of iron was studied. The reagent reacts with iron in the pH range 6.0-7.5 to form a yellow coIored 1:2 chelate which is very stable in methanol solution. Beer's law is obeyed in the concentration range 0.05∼2.0 gmL-l iron and separation procedure using a short column filled with Amberlite XAD-7 nonionic chelating resin is proposed for the spectrophotometric determination of traces of iron. The influence of several ions as interference was discussed. The separation of Fe(III) ion from the mix-ture solution were carried out with the buffer solution (pH 5.0) and 0.25M HCl as eluents.
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