Determination of formaldehyde in production solutions using the piezoelectric sensors

In the current work, piezoelectric sensors based on a molecular imprinted polymer (MIP) were obtained for determining formaldehyde in industrial solutions of woodworking plant. The synthesis was carried out directly surface sensor. process two-stage thermoimidization prepolymerization mixture, polyimide formed. For analysis supra-resin part effluent Grafskaya kuhnya LLC (Voronezh) enterprise, which by dry distillation wood, method calibration graph having linear relationship used; coefficient determination R2 = 0.97. detection limit piezosensor 0.6 ∙ 10–4 mol / dm3, range determined concentrations 1.0 – dm3. comparison without imprints and with showed high selectivity latter target molecule. calculated imprinting factor 28.3, respect to phenol 0.05, indicated modified sensor formaldehyde. verification correctness model production using "added-found" method. It found that MIP-based sensitive only formaldehyde, relative standard deviation did not exceed 2.0%. order assess effect object matrix (formaldehyde) value resonant frequency, addition used. affect analytical signal, 2.8%. re-analysis, exposed regeneration oven at 50 ⁰С. proposed concentration MIP-sensor allowed controlling content toxicant solutions.