Highly Sensetive Reaction for the Estimation of Carbaryl Using 4-4ˊ- Diaminodiphenyl Sulfone in Environmental Samples
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 sul...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2006-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2006/218073 |
| Summary: | 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. |
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| ISSN: | 0973-4945 2090-9810 |