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Abstract
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In this study, a three-dimensional adsorbent was developed based on graphene oxide/AgO nanoparticles
over interconnected nickel foam (GO/AgO@Ni foam) for rapid and efficient vortex assisted floating solid
phase extraction of bisphenol A in canned food products prior to high performance liquid
chromatography with a fluorescence detector. The analytical techniques scanning electron microscopy
(SEM), energy dispersive X-ray spectroscopy (EDX) and Fourier transform infrared (FT-IR) were used for
characterization of the synthetized GO/AgO@Ni foam. The effect of proficiency factors including pH,
foam size, vortexing time, salt addition, sample volume, desorption type and volume, and desorption
time on the extraction efficiency of bisphenol A were explored through the matrix match method. Under
the above experimental conditions, the figures of merit of the method were acquired as LODs (S/N ¼ 3)
of 0.18–0.84 mg kg1, LOQs of 0.61–2.81 mg kg1 (S/N ¼ 10), linear ranges of 0.5–500 mg kg1, and
enrichment factors of 235.5–244.9. The inter-day precision values (RSD%, n ¼ 7) of 2.5–3.6 and the
intra-day precision (%) of (5 days and seven replicates for each day) 2.8–3.8 were achieved for bisphenol
A at a concentration of 50 mg kg1. The relative recoveries of 94.0% to 99.6% were obtained for the
canned food samples.
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