For the determination of sensitivity of immobilization NPP in the filter paper test is performed against the mercury (II) ion with each different concentrations. To maintained the stability ofimmobilization on filter paper is saved in a closed box. The results obtained for the stability of immobilization NPP on filter paper can be last up to stable 60-daywhile liquid NPP stability can only last for 30 days. Immobilization NPP on filter paper is done with the technique of immobilization (immunosystem) is the process of molecular bonding reagent in supporting materials, so physically bound NPP the surface of filter paper is composed of cellulose fibers. Silver nanoparticles synthesized by reducing the ascorbic acid using a chemical reduction method. The aims of this research is improve stability and sensitivity of silver nanoparticles (NPP) immobilizatied on filter paper.
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