CARBON PASTE ELECTRODE MODIFIED WITH CARBON NANOTUBE AND MOLECULARLY IMPRINTED POLY(METHYL ORANGE) FOR VOLTAMMETRIC DETERMINATION OF BUTYLATED HYDROXYANISOLE IN COSMETICS
Butyl hydroxy anisol (BHA) is an antioxidant compound commonly used as an additive in the food and cosmetics industry. However, excessive use of BHA in cosmetics can cause potential skin health problems. Therefore, effective analytical quantification methods are needed to monitor the use of BHA in c...
Saved in:
| Main Author: | |
|---|---|
| Format: | Final Project |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/47660 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Butyl hydroxy anisol (BHA) is an antioxidant compound commonly used as an additive in the food and cosmetics industry. However, excessive use of BHA in cosmetics can cause potential skin health problems. Therefore, effective analytical quantification methods are needed to monitor the use of BHA in cosmetics. In this research, a voltammetric method for analysis of BHA was developed using carbon paste electrode (CPE) modified with carbon nanotube (CNT) and molecularly imprinted polymers (MIP) with methyl orange (MO) as a monomer. The performance of CPE-CNT-MIP was compared with the performance of CPE and CPE modified with molecularly imprinted poly(methyl orange). Measurements was carried out using 0.1 mM BHA solution and Square Wave Voltametry (SWV) technique. The measurement results using the EPK-CNT-MIP working electrode showed the highest oxidation peak current. MIP(methyl orange) electropolymerization was carried out in solution of BHA:MO = 1:1 – 1:5 using Cyclic Voltammetry (CV) techniques with cycle number of electropolymerization as 5-30 cycles. The measurement results using solution of BHA:MO = 1:5 with the cycles number of electropolymerization as 10 cycles showed the highest results. Optimization pH of measurements was carried out at the pH range of 3-8 and at pH 6 showed optimum results. CPE modified with CNT and MIP(methyl orange) showed good repeatability, with linear range of 1-10 ?M, and detection limit of 0.3416 ?M. Scan rate analysis showed that elektron transfer process was controlled by difusion process. Determination of BHA in cosmetic sample has not been tested using CPE modified with CNT and MIP(methyl orange). |
|---|