2009•Chinese Journal of Health Laboratory TechnologyRequires access
Determination of sorbic acid and benzoic in soya sauce by wide-bore capillary gas chromatographic column
Dong Chang-bo
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Abstract
Objective:A method for determination of sorbic acid and benzoic in soya sauce by wide-bore capillary gas chromatographic column has been developed.Methods:Samples were extracted with ether after acidfication and chromatographic analysis was performed on DEGS(20 m×0.53 μm×1.0 μm) wide-bore capillary column after purification and concentration.Results:The recoveries of this method were 90.0%～96.3% and the relative standard deviations were lower than 5%.The series-concentration of criteria was linear from 0.05 mg/ml to 0.25 mg/ml(r=0.9996) and the detection limits of the sorbic acid and benzoic were 3.5 μg/ml and 3.5 μg/ml,respectively.Conclusion:The method has a good separation with simple operation.Sensitivity and accuracy all reach the required standard.