Article ID Journal Published Year Pages File Type
1172244 Analytica Chimica Acta 2006 6 Pages PDF
Abstract

A novel optical sensor based on covalent immobilization for picric acid assay has been described. To improve the stability of the sensor, a terminal double bond was attached to the fluorescent compound, 3-amino-9-ethylcarbazole (AEC), via methacryloyl chloride. The resultant compound, 3-(N-methacryloyl) amino-9-ethylcarbazole (MAEC) was copolymerized with 2-hydroxypropyl methacrylate on surface-modified quartz glass plates by UV irradiation. The resulting optical sensor (optode membrane) was used to determine picric acid based on fluorescence quenching. It shows a linear response toward picric acid in the concentration range of 9.33 × 10−8 to 9.33 × 10−5 mol l−1, with rapid response, high stability and good selectivity to picric acid.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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