Use of linear solvation energy relationships for modeling responses from polymer-coated acoustic-wave vapor sensors.
The applicability and performance of linear solvation energy relationships (LSERs) as models of responses from polymer-coated acoustic-wave vapor sensors are critically examined. Criteria for the use of these thermodynamic models with thickness-shear-mode resonator (TSMR) and surface-acoustic-wave (SAW) vapor sensors are clarified. Published partition coefficient values derived from gas-liquid chromatography (GLC) are found to be consistently lower than those obtained gravimetrically, in accordance with previous reports, suggesting that LSERs based on GLC-derived partition coefficients will not provide accurate estimates of acoustic-wave sensor responses. The development of LSER models directly from polymer-coated TSMR vapor sensor response data is demonstrated and a revised model developed from SAW vapor sensor response data, which takes account of viscoelastic changes in polymeric coating films, is presented and compared to those developed by other methods.
Hierlemann
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Microsensor Research & Development Department, Sandia National Laboratories, Albuquerque, New Mexico 87185-1425, USA. hierlema@iqe.phys.ethz.ch
Zellers
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ET
Ricco
A J
AJ
D002849:Chromatography, Gas / Q000379:methods; D002853:Chromatography, Liquid / Q000379:methods; D005740:Gases / Q000737:chemistry*; D018499:Linear Energy Transfer; D008956:Models, Chemical; D011108:Polymers / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013816:Thermodynamics
D005740:Gases; D011108:Polymers; D012997:Solvents