Determination of Residual Acetaldehyde in Oral Liquid PET Bottle by Headspace Gas Chromatography
OBJECTIVE: To establish the method for determination of residual acetaldehyde in oral liquid PET bottle. METHODS: Headspace gas chromatography was adopted. The determination was performed on DB-FFAP capillary column. FID detector was used with injector temperature of 200 ℃ and detector temperature of 200 ℃ using nitrogen as carrier gas. The equilibrium temperature of headspace sampling was set at 70 t with equilibrium time of 30 min by programmed temperature. RESULTS: The linear range of acetaldehyde was 0.002~0.02 mg·L-1 (r=0.999 Dwith average recovery of 98.37% (RSD=2.82%, n=6). The detection limit was 0.1 ng. CONCLUSION: The method is accurate, relibale and can be used for determination of the limit of acetaldehyde in oral liquid PET bottle.
Headspace gas chromatographyOral liquid PET bottleAcetaldehydeResidual