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Organochlorine Compounds in Marine Fish Samples of Bangladesh



Author(s)

Md. Mazharul Islam, Robiul Islam, Mohammad Shoeb and Nilufar Nahar

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DOI:10.17265/2159-5828/2018.01.004

Department of Chemistry, University of Dhaka, Dhaka-1000, Bangladesh

Bioaccumulation of organochlorine compounds in marine fish occurs as a result of environmental pollution through human activities such as industrial and agricultural waste discharge into water bodies. The main purpose of the present study is to evaluate the current status of the contamination level of organochlorine compounds such as 4,4´-DDT, 2,4´-DDT, 4,4´-DDE and 4,4´-DDD, in the fish samples of Bay of Bengal. A total of 25 marine fish samples of 17 species including Eleutheronema tetradactylum, Metapenaeus monoceros, Lates calcarifer, Harpodon nehereus, Pampus argenteus, Setipinna phasa, Leiognathus equulus, Tenualosa ilisha, Megalapsis cordyla, Parastromateus niger, Coilia ramcarati, Otolithoides pama, Arius maculatus, Paraplagusia bilineata, Strongylura leiura, Platycephalus indicus and Gudusia chapra were collected from three different local markets for determination of organochlorine compounds using SPD (solid phase dispersion) and QuEChERS (quick, easy, cheap, effective, rugged and safe) extraction methods, and finally analyzed by gas chromatograph equipped with electron capture detector (GC-ECD). The comparison between these two methods was also made and it was found that SPD method is more efficient for the extraction of total fat content and bioaccumulation of DDTs in fish samples compared to QuEChERS method. The percentage recovery of DDTs was found to be 65%-105%. Limit of detection LOD and Limit of Quantification LOQ was found to be 0.10 ng/g and 0.30 ng/g, respectively. Total amount of DDT was found in the range of 3.83-37.80 ng/g in SPD method and 4.51-20.40 ng/g in QuEChERS method. All fish samples contained DDTs less than MRL (maximum residue limit) value (5 mg/kg according to the Codex Alimentarius Commission).

Bioaccumulation, organochlorine compounds, SPD, QuEChERS, GC-ECD and marine fish.