<b>Derivative spectrophotometric determination of trace lead in alloys and biological samples after separation and preconcentration with the ion pair of 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol and ammonium tetraphenylborate on microcrystalline naphthalene or by column method</b>
Lead is quantitatively retained on 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol-ammonium tetraphenylborate with microcrystalline naphthalene or by a column method in the pH range 4.0–6.0 from a large volume of aqueous solutions of various samples. After filtration, the solid mass consisting of the...
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Format: | Article |
Language: | English |
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Chemical Society of Ethiopia
2003-12-01
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Series: | Bulletin of the Chemical Society of Ethiopia |
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Online Access: | http://www.ajol.info/index.php/bcse/article/view/61656 |