Standardization of Stationary Source Method for Vinyl Chloride.

摘要

A program was conducted to evaluate the proposed EPA Method 106 -Determination of Vinyl Chloride from Stationary Sources. Vinyl Chloride samples in Tedlar bags remain stable for more than one week. Aluminized Mylar bags can also be used if the samples are analyzed within two days. Several compounds can interfere with the gas chromatographic analysis by forming a single unresolved peak with vinyl chloride. Acetaldehyde and ethylene oxide are serious interferences with methanol and isobutane interfering under some conditions. Retention indices have been measured for several compounds on three useful GC columns. Nearly all samples can be satisfactorily resolved with the proper choice of column. Pressurized gas cylinders of vinyl chloride in nitrogen were used for calibrations. The cylinders were standardized against gravimetrically calibrated vinyl chloride permeation tubes. Field tests were also made at a polyvinyl chloride plant and a vinyl chloride monomer plant. No serious problems with the method were found in the field tests.