Identification and Quantification of 19 Phthalic Acid Esters in Chinese Liquors Using GC-MS/MS

Using this novel approach, samples were prepared in 30 min, thus significant time and cost savings were achieved compared to routine method.
Compared with conventional GC/MS, improved selectivity and sensitivity of the analysis was achieved by GC/MS/MS technique. Problematic interferences decreased significantly compared to GC/MS, and the LODs of 19 PAEs ranged from 0.02 to 21.45 μg/L.
In addition, removing ethanol before the liquid-liquid extraction procedure resulted in significant improvement of the recovery, within the range of 70%~125%.