scholarly journals Magnetic Solid-Phase Extraction Based onβ-Cyclodextrins/Acrylic Acid Modified Magnetic Gelatin for Determination of Moxidectin in Milk Samples

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Yinzhu Shang ◽  
Jing Luo ◽  
Peng Wang ◽  
Xiaoya Zhao ◽  
Cheng Ye ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Milk Samples ◽  
Relative Standard ◽  
Magnetic Solid ◽  
Target Molecules

β-Cyclodextrins/acrylic acid modified magnetic gelatin was prepared and then employed as the magnetic solid-phase extraction (MSPE) sorbent for extraction of moxidectin in milk samples. Due to the rigidity of hydrophobic cavity ofβ-cyclodextrins and carboxyl groups of acrylic acid, magnetic composites are prepared to form a complex with target molecules through various kinds of chemical reactions and then showed excellent extraction performance. This method exhibits the advantages of simplicity of implementation, short extraction time (5 min), low solvent consumption, and high extraction efficiency. A rapid, simple, and effective method for the analysis of moxidectin in milk samples was established by MSPE coupled with liquid chromatography-fluorescence detection. The limit of detection was 0.1 ng·mL−1and the recoveries from milk samples were in the range of 93.8%–112.5%. The relative standard deviation was not higher than 6.4%. In conclusion, magnetic solid-phase extraction is a simple and robust preconcentration technique that can be coupled to other analytical methods for the quantitative determination of target molecules in complex samples.

scholarly journals Magnetic Solid-Phase Extraction Using Fe3O4@SiO2 Magnetic Nanoparticles Followed by UV-Vis Spectrometry for Determination of Paraquat in Plasma and Urine Samples

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Ou Sha ◽  
Yu Wang ◽  
Xin Yin ◽  
Xiaobing Chen ◽  
Li Chen ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Urine Samples ◽  
Phase Extraction ◽  
Simple Method ◽  
Relative Standard ◽  
Plasma And Urine Samples ◽  
Magnetic Solid

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.

Determination of quinolones in milk samples using a combination of magnetic solid-phase extraction and capillary electrophoresis

2012 ◽  
Vol 33 (13) ◽  
pp. 2041-2048 ◽  
Author(s):  
Israel S. Ibarra ◽  
Jose A. Rodriguez ◽  
Ma. Elena Páez-Hernández ◽  
Eva M. Santos ◽  
Jose M. Miranda
Keyword(s):  
Capillary Electrophoresis ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Milk Samples ◽  
Magnetic Solid

Determination of tetracyclines in milk samples by magnetic solid phase extraction flow injection analysis

2010 ◽  
Vol 171 (3-4) ◽  
pp. 407-413 ◽  
Author(s):  
Jose A. Rodriguez ◽  
Johanan Espinosa ◽  
Karina Aguilar-Arteaga ◽  
Israel S. Ibarra ◽  
Jose M. Miranda
Keyword(s):  
Solid Phase Extraction ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Milk Samples ◽  
Magnetic Solid

Magnetic molecularly imprinted conducting polymer for determination of praziquantel enantiomers in milk

The Analyst ◽  
2020 ◽  
Vol 145 (12) ◽  
pp. 4245-4253 ◽  
Author(s):  
Tienne Aparecida Nascimento ◽  
Camilla Fonseca Silva ◽  
Hanna Leijoto de Oliveira ◽  
Ricky Cássio Santos da Silva ◽  
Clebio Soares Nascimento ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Conducting Polymer ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Molecularly Imprinted ◽  
Milk Samples ◽  
Magnetic Solid ◽  
Selective Adsorbent

A new selective adsorbent based on magnetic molecularly imprinted conducting polymer was firstly synthetized and applied to the magnetic solid phase extraction (MSPE) for the determination of PZQ enantiomers in milk samples.

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