A sulpha-drug sensitive sensor based on ion-pair complex modified PQC resonator

The construction and general performance characteristics of the piezoelectric sensors responsive to sulpha-drug are described here. The proposed sensing method is based on the use of the ion-pair complex of sulphadiazine–cetyltrioctylammonium. The complex, together with cholestyramine was embedded in PVC matrix. This sensor exhibited reasonable selectivity and a sensitive mass response to sulpha-drugs. The response range of the sensor was between 1.0×10−7 and 1.0×10−5 M with a detection limit of 8×10−8 M at pH 8.63. The influencing factors were investigated in detail and optimized.