title: Determination of sulpha-drugs with a piezoelectric sensor.
abstract: A piezoelectric sensor is used for the determination of sulpha-drugs, as pure substances and in their dosage forms, by an indirect micro method based on reaction of the sulpha-drug with bromine and reduction of the resultant N-bromoderivative with iodide to form iodine, which after extraction is monitored with a piezoelectric quartz sensor. The response of the sensor is linear from 2 x 10(-5) to 4 x 10(-4)M sulpha-drug.
authors.affiliation: New Material Research Institute, Department of Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China.
authors.forename: L H
authors.initials: LH
authors.lastname: Nie
authors.forename: T Q
authors.initials: TQ
authors.lastname: Wang
authors.forename: S Z
authors.initials: SZ
authors.lastname: Yao