products. Fig. 5 shows the typical chromatograms from a fullMS/dd-MS2experiment of analytes detected in positive sam-ples. With this UHPLC/ESI Q-Orbitrap method, not only accuracywas enhanced, but also the low concentration preservative, thissuggested that the UHPLC–ESI-Q-Orbitrap-MS method was appro-priate for the screening of phthalates in foods.