CHARACTERIZATION OF GLUTARALDEHYDE COMPOSITION ON PVA ENZYME COATED PVC-KTPCLPB MEMBRANE WITH XRD, UV-VIS, SEM-EDS, AND FTIR

An indicator electrode has been made in two ways using the urease enzyme immobilization technique with Glutaraldehyde (GA) crosslinking at various concentrations (2.6 - 3.0)%. The aim is to choose the best indicator electrode from both methods, this is through XRD, SEM-EDS, and FTIR analysis. The method used is a potentiometric biosensor method. The indicator electrode for the first method is denoted PVA-E-GA/PVC-KTpClPB, meaning that PVA-E is mixed with PVA-E solution coated with PVC-KTpClPB. The indicator electrode of the second method is denoted PVA-E/GA/PVC-KTpClPB, meaning that PVA-E coated with GA is coated with PVC-KTpClPB. Each in 1x, 2x, and 3x layer variations. The best results of GA crosslinking from the first and second methods were at a
concentration of 2.9%. The best result of the first method of indicator electrode is PVA-E-GA3x/PVC-KTpClPB1x. the best result of the second method is the indicator electrode PVA-E 1x/GA 1x/PVC-KTpClPB 1x.