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The sensor response times for the absorption of organophosphate pesticides (phosmet and parathion) from aqueous solution into partially selective coatings [poly(epichlorohydrin) (PECH) and polyurethane (PU)], are investigated using guided shear horizontal surface acoustic wave (SH-SAW) devices on LiTaO3 as the sensing platform. A study of the response time (absorption time constant) reveals that it...