首页|Micellar Thin-Layer Chromatography and Preconcentration of L-Carnitine with Magnetite Nanoparticles
Micellar Thin-Layer Chromatography and Preconcentration of L-Carnitine with Magnetite Nanoparticles
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Pleiades Publishing Inc
Thin-layer chromatography (TLC) is used to study the chromatographic behavior of L-carnitine in aqueous-organic mobile phases (MPs) and aqueous MPs in the presence of the cationic surfactant cetylpyridinium chloride (CPC) on plates with a normal stationary phase based on silica. Among aqueous-organic MP, the best results are obtained for MP of the composition propanol-2-acetone-water-acetic acid (4 : 5 : 2 : 2). The best chromatographic characteristics are obtained for aqueous-micellar MPs containing 0.001 M CPC. The adsorption of L-carnitine on magnetite nanoparticles modified with cetyltrimethylammonium bromide is studied for the first time. It is found that the quantitative adsorption of the analyte with the recovery of L-carnitine 89% proceeds in 40 min. An eluent is found-ethanol, which allows 95% desorption of L-carnitine. It is found that the use of 3 mg of nanomagnetite for preconcentration makes it possible to reduce the lower limit of the L-carnitine determination by five times. A procedure for the densitometric determination of L-carnitine using micellar TLC in the "XXI POWER L-Carnitine" sports drink is developed.
NSTL
Pleiades Publishing Inc
