Determination of Ethyl Acetate,Propyl Acetate,and Butyl Acetate in Chemical Experimental Technology Competitions
A gas chromatography method was established for the simultaneous determination of three low-carbon esters,such as ethyl acetate,propyl acetate,and butyl acetate.Using isoamyl acetate as the internal standard,the determination was performed on the column of SK-1 by temperature programming.The inlet temperature was 200℃,and hydrogen flame ionization detector was adopted with the temperature of 250℃;high purity nitrogen gas was used as carrier gas with flow rate of 1.0 mL/min;the split radio was 50:1.The linear range were 1.445～7.225 mg/mL for ethyl acetate(r = 0.999 8),1.223～6.115 mg/mL for propyl acetate(r = 0.999 9),and 1.291～6.456 mg/m L for butyl acetate(r = 0.999 9);the limits of quantitation were 0.203,0.167,0.188 μg/mL respectively.RSDs of precision,reproducibility and stability tests were lower than 5%;the average recoveries rates for low,medium,and high concentrations were 96.8%～102.5%,97.4%～104.1%,and 98.1%～101.8%,respectively.This method is sensitive,accurate,easy to operate,and has fast analytical speed.It can be used for the simultaneous determination of ethyl acetate,propyl acetate,and butyl acetate in chemical experimental technology competitions.
chemical experiment technologygas chromatographyethyl acetatepropyl acetatebutyl acetateskills competition
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