Enhanced cleanup efficiency hydroxy functionalized-magnetic graphene oxide and its comparison with magnetic carboxyl-graphene for PRiME pass-through cleanup of strychnine and brucine in human plasma samples.

Author(s) Ma, J.B.; Qiu, H.W.; Rui, Q.H.; Liao, Y.F.; Chen, Y.M.; Xu, J.; Zhang, Y.; Zhu, Y.; Zhao, Y.G.
Journal Anal Chim Acta
Date Published 2018 Aug 22
Abstract

An enhanced cleanup efficiency hydroxy functionalized-magnetic graphene oxide (EH-Mag-GO) fully covered porous nano-titania as coating has been designed and synthesized. It has been evaluated in PRiME (process, robustness, improvements, matrix effects, ease of use) pass-through cleanup procedure for human plasma prior to analysis of strychnine and brucine by liquid chromatography-tandem quadrupole mass spectrometry (LC-MS/MS). Comparing with the magnetic carboxyl-graphene (Mag-CG), EH-Mag-GO is much more effective for the removal of matrix effect resulted from blood phospholipids. Under optimal conditions, the results show higher cleanup efficiency of EH-Mag-GO with recoveries in the range of 89.4%-118%. The limits of quantification (LOQs) for strychnine and brucine are 0.088 μg/L and 0.092 μg/L, respectively. Especially, the EH-Mag-GO is also evaluated for reuse (20 times) without much sacrifice of the cleanup efficiency. Validation results on linearity, specificity, accuracy and precision, as well as on the application to analysis of strychnine and brucine in six cases of suspected semen strychni poisoning demonstrate the applicability to clinical studies.

DOI 10.1016/j.aca.2018.03.008
ISSN 1873-4324
Citation Ma J-, Qiu H-, Rui Q-, Liao Y-, Chen Y-, Xu J, et al. Enhanced cleanup efficiency hydroxy functionalized-magnetic graphene oxide and its comparison with magnetic carboxyl-graphene for PRiME pass-through cleanup of strychnine and brucine in human plasma samples. Anal Chim Acta. 2018;1020:41-50.

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