Determination of trans-anisole in feed by headspace gas chromatography
A headspace gas chromatographic method was developed for the determination of trans-anethole.In this method,the sample is processed directly in the headspace injector,which reduces the loss of volatile substances and does not re-quire solvent,and optimizes the heating temperature and equilibrium time of headspace.The results showed that trans-anis-ole was linear in the range of 0.05-20 mg/mL with linear regression equation y=2158.7x-28.288.The linear correlation coef-ficient was 0.9996 and the limit of detection(3S/N)was 0.0003mg/mL.Moreover,the upper gas of the sample is extracted in the experiment,and the liquid and solid impurities in the sample do not enter the instrument,which has a good protection effect on the chromatographic column and the FID detector.The average recovery of trans-anisole was 85-109%with RSD less than 3%.The determination of trans-anisole by headspace gas chromatography is stable,accurate,convenient and re-producible,and the sample analysis is semi-automatic.
万方数据
维普
