Identification and quantification of alkylketene dimers by pyrolysis-gas chromatography/mass spectrometry and pyrolysis-gas chromatography/flame ionization detection

The various questions and problems related to the enhanced application of synthetic sizes demand analytical methods to characterize these sizes in paper. For this purpose, pyrolysis-gas chromatography/flame ionization detection (Py-GC/FID) and pyrolysis-gas chromatogrophy/mass spectrometry (Pw-GC/MS) have been investigated Examples are the analysis of samples treated with an unknown alkylketene dimer (AKD) type and the influence of CaCO3 on the pyrolytic results. With py-GC/MS, the simultaneous quantification of AKD and other additives in paper is possible if the analysis is based on pyro lytic degradation products of AKD. When the Py-GC/FID technique is applied, the area ratios of the corresponding AKD ketone peaks can be used to determine the composition of the AKD grade, and the same correlation can be used to establish a universal calibration. This calibration enables the quantification of a broad range of AKD compositions with only one calibration.