Journal
FOOD CHEMISTRY
Volume 320, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2020.126666
Keywords
Boron nitride; Silica; Adsorption; Solid-phase extraction; Dye; HPLC
Funding
- National Nature Science Foundation of China [21878133, 21722604, 21606113]
- Postdoctoral Science Foundation of China [2019M652518]
- Advanced Talents of Jiangsu University [15JDG176]
- Major science and technology projects of Henan province [CX0001F01800]
- Major special project of Kaifeng [zd17005]
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A novel dendritic silicon dioxide nanocomposite coated with a highly dispersed graphene-like boron nitride nanosheet (g-BN(x)@SiO2) was in-situ synthesized and employed as a solid-phase extraction material for the Rhodamine B (RhB) and Rhodamine 6G (R6G) enrichment in food samples prior to their quantitation by HPLC. The structures and morphologies of g-BN(x)@SiO2 were characterized by XRD, FTIR, BET and TEM. The adsorption performance and mechanism were investigated and showed an enhanced maximum adsorption capacity of 625 mg/g for RhB on the nanocomposite loaded with 1% of g-BN via a fast, spontaneous process. Under optimal extraction conditions, this method showed low detection and quantification limits (2.8 mu g/L for RhB, 2.1 mu g/L for R6G and 9.2 mu g/L for RhB, 6.9 mu g/L for R6G, respectively), good repeatability (RSD% < 3.7%), and satisfactory spiked recoveries of 94.8%-103.1% for RhB and R6G in real chili powder and beverage. Therefore, the g-BN(1%)@SiO2-based materials possess significant potential.
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