Magnetic solid-phase extraction coupled with UHPLC–MS/MS for four antidepressants and one metabolite in clinical plasma and urine samples

Bioanalysis ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 35-52
Author(s):  
Peishan Cai ◽  
Xiang Xiong ◽  
Dan Li ◽  
Yu Zhou ◽  
Chaomei Xiong

Aim: Routine therapeutic drug monitoring is highly recommended since common antidepressant combinations increase the risk of drug–drug interactions or overlapping toxicity. Materials & methods: A magnetic solid-phase extraction by using C18-functionalized magnetic silica nanoparticles (C18-Fe3O4@SiO2 NPs) as sorbent was proposed for rapid extraction of venlafaxine, paroxetine, fluoxetine, norfluoxetine and sertraline from clinical plasma and urine samples followed by ultra-HPLC–MS/MS assay. Results: The synthesized C18-Fe3O4@SiO2 NPs showed high magnetization and efficient extraction for the analytes. After cleanup by magnetic solid-phase extraction, no matrix effects were found in plasma and urine matrices. The analytes showed LODs among 0.15–0.75 ng ml-1, appropriate linearity (R ≥ 0.9990) from 2.5 to 1000 ng ml-1, acceptable accuracies 89.1–110.9% with precisions ≤11.0%. The protocol was successfully applied for the analysis of patients’ plasma and urine samples. Conclusion: It shows high potential in routine therapeutic drug monitoring of clinical biological samples.

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Ou Sha ◽  
Yu Wang ◽  
Xin Yin ◽  
Xiaobing Chen ◽  
Li Chen ◽  
...  

A rapid and simple method was optimized and validated for the separation and quantification of paraquat, a frequently used herbicide and a leading cause of fatal poisoning worldwide, at trace levels with UV-Vis spectrophotometry in plasma and urine samples by direct magnetic solid-phase extraction. Fe3O4@SiO2 nanoparticles (NPs) were used as the magnetic solid-phase extraction agents and the paraquat absorbed on NPs was eluted using NaOH and ascorbic acid. Upon optimization, paraquat could be extracted and concentrated from various samples by 35-fold. The linear range, limit of detection (LOD), correlation coefficient (R), and relative standard deviation (RSD) could reach 15.0–400.0 μg/L, 12.2 μg/L, 0.9987, and 0.65% (n=5, c = 40.0 μg/L), respectively. The Fe3O4@SiO2 NPs could be reused up to five times. The method was successfully applied to the determination of paraquat in urine and plasma at different hemoperfusion numbers in a local hospital for the patient of paraquat poisoning. The experiment result could not only enable immediate medical intervention but also benefit patients’ survival.


Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2924
Author(s):  
Karen A. Escamilla-Lara ◽  
Ana C. Heredia ◽  
Araceli Peña-Alvarez ◽  
Israel S. Ibarra ◽  
Enrique Barrado ◽  
...  

A magnetic solid phase extraction technique followed by liquid chromatography with a fluorescence detector for naproxen analysis in human urine samples was developed. The method includes the extraction of naproxen with a magnetic solid synthetized with magnetite and poly 4-vinylpriridine, followed by the magnetic separation of the solid phase and desorption of the analyte with methanol. Under optimal conditions, the linear range of the calibration curve was 0.05–0.60 μg L−1, with a limit of detection of 0.02 μg L−1. In all cases values of repeatability were lower than 5.0% with recoveries of 99.4 ± 1.3%. Precision and accuracy values are adequate for naproxen (Npx) analysis in urine samples.


RSC Advances ◽  
2015 ◽  
Vol 5 (124) ◽  
pp. 102895-102903 ◽  
Author(s):  
Amir Farnoudian-Habibi ◽  
Sahar Kangari ◽  
Bakhshali Massoumi ◽  
Mehdi Jaymand

A sensitive and highly efficient method for the determination of losartan potassium (LOS) in the presence of hydrochlorothiazide (HCTZ) via a combination of magnetic solid phase extraction (MSPE) and fluorometry techniques is suggested.


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