Journal
MICROCHIMICA ACTA
Volume 184, Issue 9, Pages 3373-3379Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-017-2346-5
Keywords
Magnetic solid phase extraction (MSPE); Molecularimprintedpolymers; Core-shellmagneticparticles; Composite magnetic materials; Molecular recognition; Sample pretreatment; Hair coloring product; High performance liquid chromatography
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Funding
- Education Commission of Hubei Province of China [T201101, D20120106]
- Open Fund of the Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules [2016-KL-009]
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The authors describe a magnetic molecular imprinted polymer (MMIP) for the extraction and detection of naphthols synthesized by surface imprinting technology using 1-naphthol as the template. The MMIPs were characterized by FT-IR spectroscopy, X-ray diffraction, thermogravimetric analysis and vibrating sample magnetometry. They are shown to be viable magnetic adsorbents for various naphthols. The effects of sample volume, pH value, ionic strength, adsorption time, and desorption solvent, volume and time were optimized. Following elution with methanol, the naphthols were quantified by HPLC. Under optimal experimental conditions, the MSPE-HPLC method exhibits a linear range from 0.02-25 mg.kg(-1) for naphthols. The limits of detection (LODs) are 6 mu g.kg(-1) for both naphthols. The method was applied to the determination of 1-naphthol and 2-naphthol in hair coloring products. Recoveries are in the range of 88.8-101.6% with relative standard deviations of less than 9.3%.
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