Determination of Acetone and Methyl Ethyl Ketone in Water.

摘要

Analytical procedures for the determination of acetone and methyl ethyl ketone in water samples were developed. Concentrations in the milligram-per-liter range were determined by injecting an aqueous sample into the analysis system through an injection port,trapping the organics on Tenax-GC at room temperature,and thermally desorbing the organics into a gas chromatograph with a flame ionization detector for analysis. Concentrations in the microgram-per-liter range were determined by sweeping the headspace vapors over a water sample at 50C,trapping on Tenax-GC,and thermally desorbing the organics into the gas chromatograph. The precision for two operators of the milligram-per-liter concentration procedure,expressed as the coefficient of variation,was generally less than 2percent for concentrations ranging from 16to 160milligrams per liter. The precision from two operators of the microgram-per-liter concentration procedure was between 2and 4percent for concentrations of 20and 60micrograms per liter.