Improved liquid-liquid extraction by modified magnetic nanoparticles for the detection of eight drugs in human blood by HPLC-MS.
Journal:
RSC advances
Published Date:
Jun 2, 2021
Abstract
Magnetic nanoparticles modified with porous titanium dioxide were used as clean-up nanospheres for the detection of eight drug poisons in human blood by high-performance liquid chromatography-mass spectrometry. The magnetic clean-up nanospheres (FeO@mTiO) with a mesoporous structure were successfully synthesized and characterized by scanning electron microscopy/energy dispersive spectroscopy, transmission electron microscopy, X-ray diffractometry, vibrating sample magnetometry, infrared spectroscopy, and Brunauer-Emmett-Teller techniques. Lipid co-extractives, such as phosphatidic acid and fatty acids, which are major interferences in HPLC-MS analysis causing ion suppression in the MS spectra of blood, could be efficiently removed by FeO@mTiO based on the Lewis acid-Lewis base interactions. Following the optimization of the quantities of FeO@mTiO, the method was applied to the determination of eight drugs in spiked blood. The analytical ranges typically extended from 2 to 500 ng mL, and the recoveries ranged from 79.5-99.9% at different concentrations of blood. The limits of quantitation for drug poisons were 0.14-1.03 ng mL, which makes the method a viable tool for drug poison monitoring in blood.
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