RAPID FOOD SAFETY SCREENING continued
Figure 3 – ESI-HPIMS mobility spectrum for 0.075 ng µL–1
Conclusion ESI-HPIMS has been shown to be a sensitive and selective method for analyzing compounds rele- vant to current food safety priorities. Separating power comparable to HPLC and UHPLC can be
(75 µg L–1
) of ciprofl oxacin in positive ion mode (left); response curve for ciprofl oxacin using positive ion mode ESI-HPIMS (right).
achieved in seconds with the added benefi t of being able to directly ionize samples from the syringe used for injection via Directspray ESI, aff ording greater throughput in sample process- ing and creation of “dilute-and-shoot” methods. This simplifi ed sample preparation and direct
Figure 4 – ESI-HPIMS mobility spectra for Sunset Yellow FCF food dye using Directspray ionization in negative ion mode.
analysis has been demonstrated for detecting phthalates in beverages with good sensitivity.
References 1. Dorne, J.L.C.M.; Bordajandi, L.R. et al. TrAC Trends Anal. Chem. 2009, 28, 695.
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