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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: Anal Methods. 2012 Apr 30;4(6):1612–1615. doi: 10.1039/C2AY25320H

Fig. 2.

Fig. 2

ESI-MS spectra (in negative ion mode) of 50% ACN eluent from α-glucosidase-MNPs (A) and PTP1B-MNPs (B) after extraction. Peak identifications: 1, ellagic acid; 2, gallagic acid; 3, punicalin; 4, punicalagin.