<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 |
| _version_ | 1811203357359996928 |
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| author | Mohammad Ali Taher |
| author_facet | Mohammad Ali Taher |
| author_sort | Mohammad Ali Taher |
| collection | DOAJ |
| description | 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 lead complex and naphthalene was dissolved with 5 mL of dimethylformamide and the metal was determined by third derivative spectrophotometry. Lead complex can alternatively be quantitatively adsorbed on ammonium tetraphenylborate-naphthalene adsorbent packed in a column and determined similarly. About 0.2 μg of lead can be concentrated in a column from 300 mL of aqueous sample, where its concentration is as low as 0.7 ng/mL. The interference of a large number of anions and cations has been studied and the optimized conditions developed have been utilized for the trace determination of lead in various samples. |
| first_indexed | 2024-04-12T02:53:20Z |
| format | Article |
| id | doaj.art-d9b574f2a79d454a817aba92bbaf2974 |
| institution | Directory Open Access Journal |
| issn | 1011-3924 1726-801X |
| language | English |
| last_indexed | 2024-04-12T02:53:20Z |
| publishDate | 2003-12-01 |
| publisher | Chemical Society of Ethiopia |
| record_format | Article |
| series | Bulletin of the Chemical Society of Ethiopia |
| spelling | doaj.art-d9b574f2a79d454a817aba92bbaf29742022-12-22T03:50:54ZengChemical Society of EthiopiaBulletin of the Chemical Society of Ethiopia1011-39241726-801X2003-12-01172129138<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>Mohammad Ali TaherLead 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 lead complex and naphthalene was dissolved with 5 mL of dimethylformamide and the metal was determined by third derivative spectrophotometry. Lead complex can alternatively be quantitatively adsorbed on ammonium tetraphenylborate-naphthalene adsorbent packed in a column and determined similarly. About 0.2 μg of lead can be concentrated in a column from 300 mL of aqueous sample, where its concentration is as low as 0.7 ng/mL. The interference of a large number of anions and cations has been studied and the optimized conditions developed have been utilized for the trace determination of lead in various samples.http://www.ajol.info/index.php/bcse/article/view/61656Trace lead determinationDerivative spectrophotometry2-(5-Bromo-2-pyridylazo)-5-diethylamminophenolAmmonium tetraphenylborateNaphthalene |
| spellingShingle | Mohammad Ali Taher <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> Bulletin of the Chemical Society of Ethiopia Trace lead determination Derivative spectrophotometry 2-(5-Bromo-2-pyridylazo)-5-diethylamminophenol Ammonium tetraphenylborate Naphthalene |
| title | <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> |
| title_full | <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> |
| title_fullStr | <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> |
| title_full_unstemmed | <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> |
| title_short | <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> |
| title_sort | 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 |
| topic | Trace lead determination Derivative spectrophotometry 2-(5-Bromo-2-pyridylazo)-5-diethylamminophenol Ammonium tetraphenylborate Naphthalene |
| url | http://www.ajol.info/index.php/bcse/article/view/61656 |
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