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  • C. Retna Raj and Bikash Kumar Jena “Ultra-sensitive Simultaneous Electrochemical Determination of Arsenic, Mercury and Copper.” US patent (US 8568825B2, Date of Patent Oct 29, 2013) 

  • C. Retna Raj and Bikash Kumar JenaMetal nanoparticle based sensors for hydrogen peroxide, uric acid and cholesterol and the preparation thereof”: Filed-Indian (Ref: No. 36/KOL/2010)