School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China.
Key Laboratory of Polyoxometalate Chemistry of Henan Province, Institute of Molecular and Crystal Engineering, Henan University, Kaifeng 475004, PR China; School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
Food Chem. 2020 Aug 1;320:126666. doi: 10.1016/j.foodchem.2020.126666. Epub 2020 Mar 21.
A novel dendritic silicon dioxide nanocomposite coated with a highly dispersed graphene-like boron nitride nanosheet (g-BN(x)@SiO) 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)@SiO 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 μg/L for RhB, 2.1 μg/L for R6G and 9.2 μg/L for RhB, 6.9 μg/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%)@SiO-based materials possess significant potential.
一种新型树枝状二氧化硅纳米复合材料，表面包覆高度分散的类石墨烯氮化硼纳米片（g-BN(x)@SiO），被原位合成并用作固相萃取材料，用于食品样品中罗丹明 B（RhB）和罗丹明 6G（R6G）的富集，然后通过 HPLC 进行定量分析。通过 XRD、FTIR、BET 和 TEM 对 g-BN(x)@SiO 的结构和形态进行了表征。研究了吸附性能和机制，结果表明，负载 1%g-BN 的纳米复合材料对 RhB 的最大吸附容量提高到 625mg/g，吸附过程快速、自发。在最佳萃取条件下，该方法对 RhB 的检测限和定量限分别为 2.8μg/L，对 R6G 的检测限和定量限分别为 2.1μg/L 和 9.2μg/L，对 RhB 和 R6G 的重复性（RSD%<3.7%）良好，在实际辣椒粉和饮料中的加标回收率为 94.8%-103.1%。因此，基于 g-BN(1%)@SiO 的材料具有很大的潜力。
