Mohammad Reza Gaeeni - Laser and Optics Research School, Nuclear Science and Technology Research Institute, AEOI, North Karegar, Tehran, Iran|Photonic Laboratory, Physics Department, Kharazmi University,Tehran, Iran
Marzieh Tohidian - Faculty of Medicine, Tehran University of Medical Sciences, Pour-Sina Ave, Tehran, Iran
Morteza Sasani Ghamsari - Laser and Optics Research School, Nuclear Science and Technology Research Institute, AEOI, North Karegar, Tehran, Iran
Mohammad Hossein Majles Ara - Photonic Laboratory, Physics Department, Kharazmi University,Tehran, Iran

Objective(s):  In our study, graphene oxide-TiO2 nanocomposite (GO/TiO2) was prepared and used for the enrichment of rutin from real samples for the first time.  Materials and Methods:   The synthesized GO/TiO2 was characterized by X-ray diffraction, scanning electron microscopy, and FT-IR spectra.  The enrichment process is fast and highly efficient. The factors including contact time, pH, and amount of GO/TiO2 affecting the adsorption process were studied.  Results:   The maximum adsorption capacity for ciprofloxacin was calculated to be 59.5 mg/g according to the Langmuir adsorption isotherm. The method yielded a linear calibration curve in the concentration ranges from 15 to 200 μg/L for the rutin with regression coefficients (r2) of 0.9990. The limits of detection (LODs, S/N=3) and limits of quantification (LOQs, S/N=10) were found to be 8 μg/Land 28 μg/L, respectively. Both the intra-day and inter-day precisions (RSDs) were < 10% .  Conclusion:  The developed approach offered wide linear range, and good reproducibility. Owing to the diverse structures and unique characteristic, GO/TiO2 possesses great potential in the enrichment and analysis of trace rutin in real aqueous samples.

Enrichment, GO-TiO2, Nanocomposite, Rutin