Development of prototype heterogeneous chitosan membrane using different plasticizer for glutamate sensing

This paper describes the preparation of and experimentation undertaken by heterogeneous chitosan membrane as ion selective electrode for glutamate ion. The linearity response was obtained in the range of 1.0 × 10⁻⁵ to 1.0 × 10⁻¹ M with a detection limit of 1.0 × 10⁻⁶ M. The performance of the electrode was found in the pH range of 4.0-8.0 at temperature 25 ± 3 °C. The response time was at 5-35 s and was useful for a period of more than 4 months. The selectivity values towards some anions indicates good selectivity over a number of interfering anions. No significant improvement of membrane performance over additional of plasticizers such as 2-NPOE, BEHA and DOPP. The electrodes gave sufficient Nernstian responses with the exception of membrane with 2-NPOE.