水溶性荧光硅纳米颗粒的制备及其对食品中亮蓝含量的高灵敏检测
Preparation of water-soluble fluorescent silicon nanoparticles and highly sensitive determination of brilliant blue content in food
以N-[3-(三甲氧基硅基)丙基]乙二胺(DAMO)和盐酸氨基葡萄糖为原料,通过一步水热法制备出发射蓝色荧光的硅纳米颗粒(Si NPs),并通过TEM、XPS、FT-IR、XRD对Si NPs的形貌和性质进行了表征。基于亮蓝(BB)可以有效猝灭Si NPs的荧光,建立准确、灵敏检测亮蓝的荧光新方法。在最佳的检测条件下,该方法对亮蓝的线性响应范围为0.2~60 μmol/L,检出限低至0.119 μmol/L。将其成功应用于饮料及糖果中亮蓝的检测,加标回收率为95.8%~109.6%。
Using N-[3-(trimethoxysilyl)propyl]ethylenediamine (DAMO) and glucosamine hydrochloride as raw materials,blue-fluorescent silicon nanoparticles (Si NPs) were successfully prepared via a one-step hydrothermal method.The morphology and properties of the as-prepared Si NPs were systematically characterized by transmission electron microscopy (TEM),X-ray photoelectron spectroscopy (XPS),Fourier transform infrared spectroscopy (FT-IR),and X-ray diffraction (XRD).A novel,accurate,and sensitive fluorescent method for the detection of Brilliant Blue (BB) was established based on the phenomenon that BB can effectively quench the fluorescence of Si NPs.Under optimal detection conditions,the method exhibited a linear range of 0.2-60 μmol/L for BB,with a limit of detection of 0.119 μmol/L.This proposed method was successfully applied to the determination of BB in beverages and candies,yielding spiked recoveries ranging from 95.8% to 109.6%.
fluorescent silicon nanoparticles / brilliant blue / fluorescence detection
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