MAGNETIC MOLECULARLY IMPRINTED POLYMER FOR DETERMINATION OF RHODAMIN OF RHODAMINE B IN FOOD SAMPLE

• Main Author: AGUSTIN NIM: 10514014, VINA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31485
• Institution: Institut Teknologi Bandung

Rhodamin B is a synthetic dye that is widely abused as food colorant because of it provides cheaper price and attractive color. If rhodamine B enters the body it can cause a negative impact on health. The aim of this research is to make molecularly imprinted polymer as sorbents which can be used in rhodamine B analysis because it has high selectivity to templat molecule. MMIP (Magnetic Molecularly Imprinted Polymer) is a modified MIP (Molecularly Imprinted Polymer) with a magnetite core intended to facilitate the polymer separation process in the solution as well as to guide the size of the MIP nanoparticles. MIPM is synthesized by “microwave” method using methacrylic acid as functional monomer, Rhodamine B as templat molecule, trimethylolpropane trimethacrylate as crosslinker, benzoyl peroxide as initiator and Fe3O4 @ SiO2 as the source of magnetite in acetonitrile as porogen. Comparison of mol molecule templat: monomer: crosslinker is 1: 4: 24. MIPM characterized the functional group with infrared spectrophotometer and polymer morphology from TEM (Transmission Electron Microscopy) image and evaluated MIPM adsorption-desorption parameters. The result from evaluation of MIPM adsorption-desorption parameters, the optimum binding time was 60 minutes with the adsorption kinetics following the pseudo-second order kinetics model. The MIPM adsorption capacity at 350 ppm in concentration of rhodamine B was 86.55 mg / g with the adsorption isotherm following the Freundlich isotherm model. MIPM has S > 1 on rhodamine B in the presence of erythrocyte B disturbance . Percent recovery from adsorption-desorption process with solvent MeOH: Ac (9: 1) of 70.09 - 77.24%. The result of MMIP application on cracker sample with spike method gives the recovery value up to 93,67 – 94,30 % and the amount of rhodamine B in cracker sample obtained equal to 57-58 mg / kg.