Quantification of trans-2- alkenals and alkadienals in Chinese liquors by simultaneous extraction / derivatization by HS- SPME coupled with GC- MS- SIM

trans-2- Alkenals and alkadienals in alcoholic beverages were important aroma and flavor compounds.A new method based on the simultaneous extraction / derivatization with o- ( 2, 3, 4, 5, 6- pentafluorobenzyl) hydroxylamine ( PFBHA) as derivatization reagent by HS- SPME coupled with GC- MS- SIM was developed for quantification of 14 trans-2- alkenals and alkadienals in Chinese liquor. This method showed good selectivity and good linearity ( R2≥0.9924) .The limits of detection ( LOD) , relative standard deviation ( RSD) , and recoveries were0.014⁰.186μg / L, less than 10.99%, and 84.47% ¹16%, respectively.The results indicated that the method provided a fast and simple technique to quantify the trans-2- alkenals and alkadienals in Chinese liquor.