Name of materials

Trade Name

Company

Origin

Prawn shell

Chitosan

Hatchery of Satkhira District, Khulna

Bangladesh

Banana fiber

Banana fiber

Local banana source

Bangladesh

Sodium hydroxide

Caustic Soda

Loba Chemie Pvt. Ltd., 107, Mumbai

India

Acid

Hydrochloric acid

Merck KGaA, 64271 Damstadt

Germany

Acetic Acid

E. Merck, D-6100 Damstadt

Germany

Sulphuric Acid

Merck KGaA, 64271 Damstadt

Germany

Nitric Acid

Merck KGaA, 64271 Damstadt

Germany

Oxidizing agent

Potassium dichromate

Loba Chemie Pvt. Ltd., 107, Mumbai

India

Water

Distilled Water

Laboratory

Bangladesh