Journal
FOOD CHEMISTRY
Volume 269, Issue -, Pages 413-418Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.07.032
Keywords
Food analysis; N-doped magnetic materials; Liquid chromatography with tandem mass spectrometry; Response surface methodology
Funding
- National Nature Science Foundation of China, China [21777089, 21477068]
- Key Research and Development Program of Shandong Province [2017GSF17107, 2018GSF117036]
- Shandong Province Taishan Scholar Program [Ts201712063]
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Magnetic N-doped carbon nanotubes were firstly applied as adsorbent in food analysis for pre-concentration of bisphenols in fruit juices followed by ultra-high performance liquid chromatography-tandem mass spectrometry determination. The magnetic nanoparticles were characterized by X-ray diffraction, infrared spectroscopy, scanning electron microscopy and vibrating sample magnetometer. The adsorption conditions were further optimized by response surface methodology. Under optimal conditions, the method provided good linearity with correlation coefficient (r=0.9979), excellent intermediate precisions (2.71-5.91%, n=3), low limits of detection (LODs) ranging from 0.43 to 2.47 ng L-1, and satisfying recoveries of three juice samples (between 90.6% and 101%).
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