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A Comparative Study of Using Formalin in Fish of Tangail and Tongi Town

Luthfunnesa Bari
Department of Food Technology and Nutritional Science, Mawlana Bhashani Science and Technology University, Santosh, Tangail.

M. Ariful Islam
Department of Food Technology and Nutritional Science, Mawlana Bhashani Science and Technology University, Santosh, Tangail.

Zannatul Ferdous
Department of Food Technology and Nutritional Science, Mawlana Bhashani Science and Technology University, Santosh, Tangail.

M. Atiqul Azman
Department of Food Technology and Nutritional Science, Mawlana Bhashani Science and Technology University, Santosh, Tangail.

Shahanaz Khatun
Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi, Bangladesh.

Md. Imam Hossain
Department of Biotechnology & Genetic Engineering, Mawlana Bhashani Science and Technology University, Santosh, Tangail, Bangladesh

Abstract/ Executive Summary:

Context: Recent reports of media have brought great attention to the problem of formalin used by whole sellers and venders in preserving fish. It is evident from several studies that fish items in different markets in Bangladesh are treated with formalin for preservation which is highly hazardous and carcinogenic chemical. Objectives: The study was undertaken to determine the presence of formalin in fishes collected from various wet markets of Tangail and Tongi town. Materials and Methods: From 12 selected wet markets, various species of fishes were collected and presence of formalin was detected using the “formalin detection kit in fish” developed by Bangladesh Council of Scientific and Industrial Research (BCSIR). Results: It was found that 16 fishes were formalin contaminated out of 192 fish samples in which 0% in Santosh bazar, 11.11% in Soi ani bazar, 13.33% in Park bazar, 14.81% in Old bus stand bazar, 0% in Chara bari bazar and 12.82% in New bus stand bazar of Tangail town. On the other hand, 33 formalin contaminated fish out of 171 were obtained in which 0% in Coto bazar, 20% in Gazipura bus stand bazar, 37.5% in Chourasta bazar, 0% in Boro bari bazar, 36.36% in Cherag Ali bazar and 20% in Tongi bazar of Tongi town. The study indicates that almost 8.33% of fish samples in Tangail town and 19.29% of fish samples in Tongi town were formalin contaminated. Conclusion: The present study revealed that in Tangail town 75% imported fish and 25% local fishes were formalin contaminated whereas in Tongi town, 82% imported fishes and 18% local fishes were formalin contaminated.

Keywords: Formalin; BCSIR, Formalin detection kit; Shelf-life.

Location: Six wet markets in Tangail town and six markets in Tongi town

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Fish

Objectives:

The study was undertaken to determine the presence of formalin in fishes collected from various wet markets of Tangail and Tongi town.

Methodology:

Fish sample collection: A total of 363 fish samples were collected. Six wet markets in Tangail town and six markets in Tongi town were selected according to their location, large scale marketing and economic condition of the inhabitants etc. The markets in Tangail town include Santosh bazar, Soi ani bazar, Park bazar, Godaon bazar (old bus stand), Chara Bari bazar and New bus stand bazar. The markets of Tongi town were Coto bazar, Gazipura bus stand bazar, Chourasta bazar, Boro bari bazar, Cherag ali bazar and Tongi bazar. Various fish sample e.g. Mrigel (Cirrhinus cirrhosus), rui (Labeo rohita), kal baoush (Labeo calbasu), catla (Catla catla), silver karp (Hypophthalmichthys molitrix), boal (Wallago attu), elish (Tenualosa ilisha), telapia (Oreochromis mossambicus), aaeer (Sperata aor), baeem (Mastacembelus armatus), chitol (Chitala chitala), foli (Notopterus notopterus), koi (Anabas testudineus), sorputi (Puntius sarana), etc were collected from selected wet markets. Qualitative detection of formalin using formalin detection kit for fish: Qualitative detection of formalin was performed by the formalin detection kit for fish developed by Bangladesh Council of Scientific and Industrial Research (BCSIR). This kit contains three different solutions labeled as solution 1, 2 and 3. First, the samples were washed with small quantity of water and a portion of washed out water was taken in a test-tube using a dropper incorporated in the kit. 15 drops of solution 1 was added in the test-tube containing washed out water. After well stirring, the solution was allowed react for 30 seconds. 15 drops of solution 2 was added in the same test-tube. After waiting for 30 seconds, solution 3 was added, change in color pink or red indicated the presence of formalin whereas unchanged color indicated the sample is free from formalin.

Source of Information: J. bio-sci. 21: 43-49, 2013, ISSN 1023-8654

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The current study involves a small number of samples to detect formalin in fish in selected local wet market of Tangail and Tongi town. But it gives us a comprehensive picture to understand the extent and magnitude of the scenario. So the government and other agencies can take necessary steps to prevent such type of blacken activities by the fish traders to safe guard public health.

Knowledge Management: Journal