Spectrophotometric Determination of Chromium in Water, and Pharmaceutical Samples Using 1-Naphthol
Facile and sensitive spectrophotometric methods for the determination of trace and ultra trace amounts of chromium (VI) are described. 4-aminoantipyrine (APP) reacts with 1-naphthol (NPL) in presence of oxidising agent potassium dichromate in acidic medium to produce red coloured product having λmax...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2005-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2005/140534 |
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| author | K. Suvardhan S. Ramanaiah K. Suresh Kumar D. Rekha Umayur Bhagan G. R. K. Naidu G. Krishnamurthy Naidu B. S. Sastry P. Chiranjeevi |
| author_facet | K. Suvardhan S. Ramanaiah K. Suresh Kumar D. Rekha Umayur Bhagan G. R. K. Naidu G. Krishnamurthy Naidu B. S. Sastry P. Chiranjeevi |
| author_sort | K. Suvardhan |
| collection | DOAJ |
| description | Facile and sensitive spectrophotometric methods for the determination of trace and ultra trace amounts of chromium (VI) are described. 4-aminoantipyrine (APP) reacts with 1-naphthol (NPL) in presence of oxidising agent potassium dichromate in acidic medium to produce red coloured product having λmax of 485 nm. The molar absorptivity and Sandell's sensitivity were 2.07x104 l mol-1 cm-1 and 0.00240 μg/cm2 respectively. The colour is stable for more than 6 h. The system obeys Beer's law in the range, 2-18 μg for determination of chromium (VI). The detection limits of chromium (VI) is 0.048 μg mL-1. The method is highly reproducible and has been applied to the analysis of chromium in synthetic, natural water samples and pharmaceutical preparations and the results compared favourably with the reported method. |
| format | Article |
| id | doaj-art-3966e55e31b54b3faf9139da77edcbec |
| institution | Kabale University |
| issn | 0973-4945 2090-9810 |
| language | English |
| publishDate | 2005-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | E-Journal of Chemistry |
| spelling | doaj-art-3966e55e31b54b3faf9139da77edcbec2025-02-03T05:51:55ZengWileyE-Journal of Chemistry0973-49452090-98102005-01-012161410.1155/2005/140534Spectrophotometric Determination of Chromium in Water, and Pharmaceutical Samples Using 1-NaphtholK. Suvardhan0S. Ramanaiah1K. Suresh Kumar2D. Rekha3Umayur Bhagan4G. R. K. Naidu5G. Krishnamurthy Naidu6B. S. Sastry7P. Chiranjeevi8Environmental Monitoring Laboratory, Department of Chemistry, S. V University, Tirupati-517502, IndiaDepartment of Geology, S. V University, Tirupati-517502, IndiaEnvironmental Monitoring Laboratory, Department of Chemistry, S. V University, Tirupati-517502, IndiaEnvironmental Monitoring Laboratory, Department of Chemistry, S. V University, Tirupati-517502, IndiaHindu College, M.S University, Nagarkoal, Tamil Nadu, IndiaDepartment of Environmental Sciences, S. V University, Tirupati-517502 .A.P., IndiaDepartment of Pharmacy, S.V. Govt. Polytechnic, Tirupati-517501 .A.P., IndiaDepartment of Pharmaceutical Sciences, Andhra Univeristy, Vishakapatnam-530003.A.P., IndiaEnvironmental Monitoring Laboratory, Department of Chemistry, S. V University, Tirupati-517502, IndiaFacile and sensitive spectrophotometric methods for the determination of trace and ultra trace amounts of chromium (VI) are described. 4-aminoantipyrine (APP) reacts with 1-naphthol (NPL) in presence of oxidising agent potassium dichromate in acidic medium to produce red coloured product having λmax of 485 nm. The molar absorptivity and Sandell's sensitivity were 2.07x104 l mol-1 cm-1 and 0.00240 μg/cm2 respectively. The colour is stable for more than 6 h. The system obeys Beer's law in the range, 2-18 μg for determination of chromium (VI). The detection limits of chromium (VI) is 0.048 μg mL-1. The method is highly reproducible and has been applied to the analysis of chromium in synthetic, natural water samples and pharmaceutical preparations and the results compared favourably with the reported method.http://dx.doi.org/10.1155/2005/140534 |
| spellingShingle | K. Suvardhan S. Ramanaiah K. Suresh Kumar D. Rekha Umayur Bhagan G. R. K. Naidu G. Krishnamurthy Naidu B. S. Sastry P. Chiranjeevi Spectrophotometric Determination of Chromium in Water, and Pharmaceutical Samples Using 1-Naphthol E-Journal of Chemistry |
| title | Spectrophotometric Determination of Chromium in Water, and Pharmaceutical Samples Using 1-Naphthol |
| title_full | Spectrophotometric Determination of Chromium in Water, and Pharmaceutical Samples Using 1-Naphthol |
| title_fullStr | Spectrophotometric Determination of Chromium in Water, and Pharmaceutical Samples Using 1-Naphthol |
| title_full_unstemmed | Spectrophotometric Determination of Chromium in Water, and Pharmaceutical Samples Using 1-Naphthol |
| title_short | Spectrophotometric Determination of Chromium in Water, and Pharmaceutical Samples Using 1-Naphthol |
| title_sort | spectrophotometric determination of chromium in water and pharmaceutical samples using 1 naphthol |
| url | http://dx.doi.org/10.1155/2005/140534 |
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