An in situ mesopourous surface imprinted polymeric (SIP) sensor was synthesized for a highly sensitive, selective, and kinetically faster detection of the high-vapor-pressure nerve gas surrogate methyl salicylate (MES). Visual detection occurred on the filtrate thin films at 25 pM. Other nerve gas surrogates, TP, DMP, DMMP, PMP, and 1,4-thioxane, were tested and showed a decrease in sensitivity compared to MES. In addition, 2,6-dipicolinic acid (DPA), a biological indicator, was also investigated and showed a decrease in sensitivity compared to MES. Finally, the detection plateau was reached at 40 s and at 1.5 × 10−4 M from pH 6–11.
Vol. 3, Iss. 7 Virtual Journal for Biomedical Optics
Clint B. Smith, John E. Anderson, Richard D. Massaro, Balaji Tatineni, Kinson C. Kam, and Gary C. Tepper, "Fluorescence Resonance Energy Transfer Based MCM-EDTA-Tb3+-MES Sensor," Appl. Spectrosc. 62, 604-610 (2008)