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Molecules ; 25(12)2020 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-32630475

RESUMO

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.


Assuntos
Cromatografia Líquida de Alta Pressão/métodos , Magnetismo , Naproxeno/urina , Polímeros/química , Polivinil/química , Extração em Fase Sólida/métodos , Humanos
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