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Sensitivity of modified bulk acoustic waves for the detection of phenols in the vapour phase

✍ Scribed by Ljubinka V. Rajaković; Milan B. Bastić; Yakov I. Korenman; Svetlana A. Tunikova; Nataša V. Bel'skih

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
821 KB
Volume
318
Category
Article
ISSN
0003-2670

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✦ Synopsis

The potential ability of a bulk acoustic wave device oscillating in a thickness shear mode (BAW/TSM) chemically modified with various compounds (4-amino-antipyrine, poly(viny1 pyrrolidone), Carbowax-20M, Triton X-100) for selective binding and assay of phenol compounds in the vapour phase has been investigated. The sensor was tested in a continuous flow system. The highest sensitivity was achieved with 4-amino-antipyrine as coating. It was estimated that the maximal frequency response was about 100 Hz for 20 pg of coating and for a phenol concentration of 0.05 mg drne3 in air. The frequency response of the sensor to various phenol derivatives was correlated with adsorption and absorption during a dissolution process onto the surface of the coating sensor.

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