MODIFICATION OF CARBON PASTE ELECTRODE WITH METHYL RED ELECTROPOLYMERIZATION FOR L-CYSTEINE ANALYSIS BY VOLTAMMETRY

• Main Author: Ranie Gm, Gitta
• Format: Final Project
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/53376
• Institution: Institut Teknologi Bandung

Cysteine is one type of non-essential amino acid, namely amino acids that can be produced by the body. However, sometimes a person also needs to increase cysteine from outside the body by consuming several foods that contain cysteine, such as soybeans, beef, lamb, sunflower seeds, chicken, wheat, fish, cheese, eggs, nuts, and yout. Lack of levels of cysteine in the human body can cause several diseases such as hair depigmentation, edema, liver damage, loss of muscle strength, and fat. In this study, the voltammetry method using a carbon paste electrode modified with a moleculary imprinted polymer (MIP) was selected to determine the levels of cysteine in the sample. The voltammetry method was chosen because the analysis time is fast and can be used to measure some of analytes simultaneously and the analyte is also small. The use of MIP itself was chosen because this method is able to increase the sensitivity and selectivity of various analyte measurements. The use of methyl red as a monomer is expected to be a substance that can show good catalytic activity against the carbon paste electrode to determine cysteine.