Modification of Carbon Paste Electrode with Molecularly Imprinted Poly(Glutamic Acid) for Determination of Rhodamine-B: A Preliminary Study
Henry Setiyanto1*, Ferizal1, Muhammad Yudhistira Azis1, Muhammad Ali Zulfikar1, Vienna Saraswaty2, Nandang Mufti3

1Analytical Chemistry Research Group, Institut Teknologi Bandung, Bandung, Indonesia
2Research Unit for Clean Technology, Indonesian Institute of Sciences, Bandung, Indonesia
3Department of Physics, Universitas Negeri Malang, Malang, Indonesia

Abstract

The modification of carbon paste electrode (CPE) with molecularly imprinted polymer (MIP) for determination of rhodamine-B by potentiometry method has been studied. The experiments were performed using glutamic acid as a monomer. The composition of monomers, the number of electropolymerization cycles and pH of the solution were used to describe modification electrodes made (CPE-MIP’s) and the electrode characteristics were evaluated. It was observed the amount of oxidation current signal increase with increasing glutamic acid concentration. The optimal polymerization molar ratio of the functional monomer to the template molecule rhodamine-B was 3:1; the maximum number of electropolymerization was 15 and the optimum pH of supporting electrolyte solution was 4.

Keywords: CPE, MIP, polyglutamic acid, rhodamine-B

Topic: Chemistry