Determination of lactic acid and acrycis acid in reactive liquor of lactic acid catalytic preparing acrycis acid

A method about the determination of lactic acid and acrycis acid in reactive liquor of lactic acid catalytic preparing acrycis acid by gas chromatograply was set up. It was separated well with 10% PEG-20M packed column (3×3mm) under the flow rate of carrier gas (nitrogen) 30mL·min-1, the flow rate of hydrogen gas 88 mL·min-1, the flow rate of air 300 mL·min-1, the temperature of feed-entrance and detector 160℃, the temperature of column 150℃. It was detected with FID detector using (n-)butanol as an internal standard. The linear correlative coefficient of lactic acid and acrycis acid were 0.9994 and 0.9996, RSD were 0.74% and 0.56% , the average recovery were 97.35% and 97.60% , the detection limit were 8.62mg·L-1 and 1.21 mg·L-1. This method was convenient rapid and accurate.