title: Fourier transform infrared spectrometric determination of Ziram.
abstract: A procedure has been developed for vapour-phase Fourier transform infrared determination of Ziram, a dithiocarbamate pesticide. The method is based on the evolution of CS(2), after decomposition of the dithiocarbamate with diluted H(2)SO(4) at 50 degrees C. The CS(2) evolved was swept by a carrier flow of nitrogen to a laboratory-made infrared gas cell of 39 mm pathlength and 490 mul volume. The signals were registered as a function of time. The area of peaks obtained from absorbance measurement in the wavenumber range between 1600 and 1450 cm(-1) were interpolated in a calibration line established from Ziram standards treated in the same way as samples. The method provided an absolute limit of detection of 0.055 mg, a variation coefficient of the order of 6% for an analyte mass of 50 mg, and an analysis time of 3.5 min.
authors.affiliation: Department of Analytical Chemistry, University of Valencia, 50 Dr. Moliner St.46100 Burjassot, Valencia, Spain.
authors.forename: A R
authors.initials: AR
authors.lastname: Cassella
authors.forename: S
authors.initials: S
authors.lastname: Garrigues
authors.forename: R C
authors.initials: RC
authors.lastname: de Campos
authors.forename: M
authors.initials: M
authors.lastname: de la Guardia