METHOD OF MEASURING CONCENTRATION OF POLYMERISATION INHIBITOR CONTAINED IN FLUORINE-CONTAINING OLEFINIC MONOMER AND METHOD OF POLYMERISING FLUORINE-CONTAINING OLEFINIC MONOMER, CONTAINING THE MEASUREMENT METHOD

摘要

This invention provides a method of precision determination of the hydrocarbon-base polymerisation inhibitor content in a fluorine-containing olefinic monomer, contained in a trace amount such that it cannot be detected even by gas chromatography. The method comprises bringing the fluorine-containing olefinic monomer into contact with concentrated sulfuric acid, measuring then the UV absorption spectrum of concentrated sulfuric acid, and determining a trace polymerisation inhibitor content from its absorbance and a working curve prepared in advance.