1. a Pesticide Residue Laboratory, Department of Agricultural Chemicals , Bidhan Chandra Krishi Viswavidyalaya , Mohanpur – 741 252, Nadia, West Bengal, India
2. b Chemical Laboratory (Unit # 7&8), Chandrapura Thermal Power Station, Damodar Valley Corporation , Chandrapura – 828 403, Bokaro, Jharkhand, India