SPECTROPHOTOMETRIC DETERMINATION OF CARBOFURAN IN COMMERCIAL SAMPLES BY OXIDATION WITH POTASSIUM FERRICYANIDE

Abstract

A spectrophotometric method for the determination of carbofuran has been studied. Method comprises of alkaline hydrolysis of the pesticide and the resulting phenol is reacted with potassium ferricyanide. The dye product formed has maximum absorption at 475 nm. Various factors affecting the formation of complex have been investigated. A linear calibration curve, over the range 17.7 µg ml-1 to 106.22 µg ml-1 with molar absorptivity 4.66X102 l mol-1cm-1, is obtained. Correlation coefficient, slope and intercept have been calculated as 0.992, 198.112 and 1.552 respectively. The performance of the proposed method has been determined in terms of sensitivity and reproducibility

Keywords

• Spectrophotometer,Carbofuran,Potassium ferricyanide,Complexation,Alkaline hydrolysis

References

1. 1. J. R. Rangaswamy, Y. N. Vijayshankar and S. R. Prakash, Journal of AOAC International, 59, 1276 (1976).
2. 2. R. C. Gupta, Journal of Toxicology and Environmental Health, 43, 383 (1994).
3. 3. E. P. Maitlen and N. A. Sladen, British Crop Protection Conference - Pests and Diseases, 2, 557 (1979).
4. 4. V. E. Clay, M. A. H. Fahmay and T. R. Fukuto, Journal of Agricultural and Food Chemistry, 28, 1122 (1980).
5. 5. A Zanella, R. M. Dallago and E. M. Flores, Analytical Letters, 32, 593 (1999).
6. 6. Y. K. Rao, S. K. Lokanath and B. Rangamannar, Proceedings of the Third International Conference on Environment and Health; Chennai: India, 400 (2003).
7. 7. R. F. Cook, J. E. Jackson and G. H. Fujie, Journal of Agricultural and Food Chemistry, 25, 1013 (1977).
8. 8. R. D. Voyksner, Applications of New Mass Spectrometry Techniques in Pesticide Chemistry, Wiley Interscience, New York, 146 (1987).

9. 9. H. M. Stahr, Analytical Methods in Toxicology, Wiley Interscience, New York, 157 (1991).
10. 10. C. N. Wan and P. D. Harrington, Analytica Chemica Acta, 408, 1 (2000).
11. 11. C. L. Bruce, C. M. James and H. F. Glenn, Journal of Agricultural and Food Chemistry, 31, 220 (1983).
12. 12. C. V Rajeswari and P. R. Naidu, Journal of Food Science and Technology, 23, 101 (1986).
13. 13. D. V. Naidu and P. R. Naidu, Talanta, 37, 629 (1990).