Method for determining the proportion of HDPE and LDPE in polyolefin mixtures

摘要

The invention relates to a method for the quantitative determination of LDPE in mixtures which contain LDPE and HDPE, characterized in that with a solvent which contains an aliphatic alkane or an ester and which has a boiling point in the range from 60 to 100 ° C. at 1013 mbar, selectively dissolved LDPE and its proportion is determined gravimetrically, the selective solution of the LDPE being carried out in a stirred flask while boiling under reflux and the further working up and separation by hot filtration, or the selective solution of the LDPE being carried out in a Soxhlet apparatus becomes.