A Novel Potentiometric Membrane Sensor for Determination of Glutamate Based on [4](1)(2,3-Diazabuta-1,3-diene) ferrocenophane

作者：Bakeman Norhafizah^*; Isa Illyas Md; Ali Noorshida Mohd; Ahmad Mustaffa; Ghani Sazelli A

来源：International Journal of Electrochemical Science, 2012, 7(5): 4574-4584.

• [4](1)(2,3-Diazabuta-1,3-diene)ferrocenophane
• Glutamate membrane sensor
• Monosodium glutamate
• Potentiometric

A novel potentiometric membrane sensor has been developed and optimized based on [4](1)(2,3-Diazabuta- 1,3-diene) ferrocenophane as an ionophore in poly(vinyl chloride) matrix membrane (PVC) plasticized with tris(2-ethylhexyl) phosphate (TEHP) for high selective determination of glutamate. The sensor works well in a linear range of 1.0x10(-5) to 1.0x10(-1) M glutamate with a Nernstian slope of 57.6 +/- 1.0 mV/decade and its detection limit is 7.95x10(-6) M. The sensor shows working range over the pH 6-10 at temperature 25 +/- 1 degrees C and stable for a period of 3 months without any divergence in potentials with response time <= 30s. The selectivity coefficient values as determined by mixed interference method indicate a good selectivity for ions over a wide variety of other tested anions.

• 出版日期2012-5