Quantitative Analysis of Pesticide Residues in Some Pond Water Samples of Bangladesh
This study was undertaken to investigate the extent of contamination from pesticide residues in pond water samples of Bangladesh. Twenty water samples collected from different locations of Bangladesh were analyzed for the presence of organochlorine (OCs) and carbamate pesticide residues. Packed column Gas Chromatographic (Electron Capture Detector Mode) and High Performance Liquid Chromatography (HPLC) technique were used to determine the concentration levels of those pesticide residues. The results indicate some water samples contaminated by organochlorine and carbamate pesticide (carbaryl and carofuran). The concentration of organochlorine pesticide, DDE and heptachlor in water sample no. 1 were 0, 0.014 and 0.048 ppm, respectively. The concentration of organochlorine pesticide, DDE, DDD and DDT in water sample no. 3 were 0, 0.014, 0.052 and 0.316 ppm, respectively. The DDT, DDE, DDD and heptachlor were found within the WHO guideline value of water quality (2 mgL–1 and 0.03 mgL–1). The concentration of carbaryl in water samples nos. 4, 8 and 10 were 0.609, 0.168 and 0.146 ppm, respectively. The residue level of carofuran pesticide was found to be in range of 0.398-2.208 ppm. The highest concentration for carbofuran was 2.208 ppm in water sample no. 9, while the lowest concentration was 0.398 ppm in water sample no. 19. The concentration of carbofuran was also found within the acceptable ranges according to the WHO guideline value of water quality
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