Optimization of solvent extraction method for gel permeation chromatography assay of polymeric modifier - polios 250 in smokeless powders

摘要

The quantification of Polios 250 - polymeric modifier of burning layer in smokeless powders was investigated. Different solvents and extraction parameters were used for selective separation of applied modifier. Two solvent extraction methods were compared e.g. with application of magnetic stirrer and ultrasonic-assisted. For quantification gel permeation chromatography (GPC) with UV-DAD detector was applied. The use of DAD detection at 320 nm with reference at 490 nm make possible optimal integration of Polios peak which is separated at a baseline level from peak of nitrocellulose and peak of low molecular stabilizer - diphenylamine. The obtained results proved that 80-95% of modifier deposited on powders surface was extracted.