QIN Yan-fang,ZHAO Bing-xin,LI Xiao-jiao,et al.Determination of Carvedilo in Biological Samples Using a Fluorescence Spectrophotometry Coupled with Magnetic Solid Phase Extraction[J].Journal of Instrumental Analysis,2021,40(08):1171-1176.
QIN Yan-fang,ZHAO Bing-xin,LI Xiao-jiao,et al.Determination of Carvedilo in Biological Samples Using a Fluorescence Spectrophotometry Coupled with Magnetic Solid Phase Extraction[J].Journal of Instrumental Analysis,2021,40(08):1171-1176. DOI: 10.19969/j.fxcsxb.20121003.
Determination of Carvedilo in Biological Samples Using a Fluorescence Spectrophotometry Coupled with Magnetic Solid Phase Extraction
In this work, Fe,3,O,4,@COF(TpBD) magnetic composites were successfully synthesized through the reaction of Fe,3,O,4, nanoparticles, 1,3,5-trimethylphloroglucinol (Tp) and benzidine (BD) via a solvothermal approach. The fabricated magnetic nanocomposites were applied as the adsorbent for magnetic solid phase extraction (MSPE) of carvedilo (CAR). Coupled with fluorescence spectrophotometry, a new analytical method of MSPE was developed for the determination of CAR in biological samples. The Fe,3,O,4,@COF(TpBD) absorbent was characterized by transmission electron microscopy(TEM), X-ray diffraction(XRD), Fourier transform infrared spectrometry(FT-IR), vibrating sample magnetometry(VSM) and surface area and pore size analyzer. The experimental parameters were optimized, including pH value of solution, amount of adsorbent, adsorption time, the type and volume of desorption solvent and desorption time. The optimum MSPE conditions were as follows: a solution pH value of 6.0, an adsorbent amount of 5 mg, an extraction time of 4 min, and a desorption time of 5 min. Under the optimum conditions, the method exhibited good linearity in the concentration range of 1-100 ng/mL. Moreover, the limits of detection(,S/N ,= 3) and quantification(,S/N ,= 10) were 0.19 and 0.63 ng/mL, respectively. Recoveries at low, medium and high spiked levels were in the range of 95.9%-98.7%. With the advantages of good recovery, high sensitivity and good stability, the proposed method could be applied to the analysis of CAR in plasma and urine samples.
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