Comparison of determination of hexanal in edible oils by static headspace and headspace- SPME method

Two methods for determination of hexanal in edible oils were analyzed by Static Headspace( SHS) and Headspace- Solid Phase Microextraction( HS- SPME) respectively.The hexanal were quantitatively analyzed by the gas chromatography( GC).HS- SPME and SHS were compared in terms of linear response,precision,accuracy,and detection limit.The results showed that both two methods had good linear correlation between 0.00 and 1.0 μg / g,the coefficient were above 0.999.At the same time,the result of SHS had good stability,reproducibility and sample recovery with 98.63% ~100.02% and RSD was 0.74% ~2.92%,which was better than that of the HS- SPME.And the detection limit of SHS( 5.3 ng / g) was lower than SPME( 31.5 ng / g). There were no significant difference between the two methods,However,the SHS was more reliable and accurate,it could be considered as the optimum method for the analysis the contents of hexanal in edible oils when applied in the lab.