Determination of Trace Moisture Content in Dimethylacetamide by Gas Chromatography

Dimethylacetamide is used as a solvent in polymer processing and moisture in DMA affects the morphology and mechanical properties of the polymer products. This paper describes a method for determination of trace moisture content in DMA by acetylene production - gas chromatography. In the condition of 30 centigrade and ultrasonic dispersion, moisture in DMA sample was reacted with calcium carbide and its product of acetylene was measured by gas chromatography. By this way, trace moisture in DMA was determined with RSD of 2.272 percent and limit of measurement was 0.002 percent.