摘要
以原子层沉积技术(ALD)制备出的壳层厚度为1 nm的Ag@Al_2O_3核壳纳米粒子为基底,采用壳层隔绝纳米粒子增强拉曼光谱(SHINERS)技术对色素检测进行探究。对Ag@Al_2O_3粒子的最佳粒径、色素检出限做了研究,并对实际样品中日落黄和柠檬黄的色素添加进行SHINERS检测。结果表明,对日落黄和柠檬黄具有最佳SHINERS效果的Ag@Al_2O_3粒子的最佳粒径为300 nm,方法对日落黄和柠檬黄标准溶液的检出限分别为10μg/L和100μg/L,对液体饮料中日落黄和柠檬黄标准品的SHINERS检出限分别为10 mg/L和50 mg/L,对所选实际样品中部分样品的日落黄和柠檬黄添加不符合国家标准。
This study investigated the detection of pigment based on Ag @ Al2 O3 core-shell nanoparticles with shell-isolated nanoparticle-enhanced Raman spectroscopy （SHINERS）. The Ag@ Al2O3 core-shell nanoparticles, which shell thickness was 1 nm, was made by using atomic layer deposition （ALD） technique. The study explored the best particle size of Ag @ Al2 O3 with best SHINERS effect and the SHINERS LOD of pigment. The method was also applied to detect pigments in drink and food samples. The results showed that the best size of Ag@ AlE O3 nano particle with best SHINERS effect of sunset yellow and lemon yellow was 300 nm, the SHINERS LOD of standard solutions of sunset yellow and lemon yellow were 10 μg/L and 100 μg/L, respectively, the SHINERS LODs of sunset yellow and lemon yellow in drink were 10 mg/L and 50 mg/L,respectively, and sunset yellow and lemon yellow in some of the selected real samples do not meet the national standards.
出处
《分析试验室》
CAS
CSCD
北大核心
2017年第5期497-502,共6页
Chinese Journal of Analysis Laboratory
基金
国家自然科学基金(U1505243)
福建省自然科学基金(2015J01064)项目资助
