Highly Sensetive Reaction for the Estimation of Carbaryl Using 4-4ˊ- Diaminodiphenyl Sulfone in Environmental Samples
| Autor: | Besagarahally L. Bhaskara, Padmarajaiah Nagaraja |
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| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | E-Journal of Chemistry, Vol 3, Iss 4, Pp 250-256 (2006) |
| Druh dokumentu: | article |
| ISSN: | 0973-4945 2090-9810 |
| DOI: | 10.1155/2006/218073 |
| Popis: | A rapid, sensitive Spectrophotometric method for the determination of ultra trace amount of carbaryl (1- Napthyl-N- Methyl Carbamate) is proposed. The method is based on an alkali hydrolysis of carbaryl in the presence of methanolic KOH, followed by coupling with diazotized 4-41- diaminodiphenyl sulfone in an alkaline medium. The water soluble pink dye obtained shows an absorption maximum at 540 nm. The system obeys Beer’s law over the range of 0.06-2.0μg mL-1. The absorptivity of the coloured product is 7.014 × 104 l mol-1 cm-1 and the developed colour is stable for 48h. The detection limit of Carbaryl is 0.0102 μg mL-1. This method is a very good alternative tool and it can be used successfully for the determination of carbaryl residue in environmental water and grain samples. |
| Databáze: | Directory of Open Access Journals |
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