荧光
吸光度
检出限
基质(化学分析)
吸附
化学
光子上转换
选择性
滤波器(信号处理)
分析化学(期刊)
光化学
纳米技术
材料科学
色谱法
离子
有机化学
光学
计算机科学
催化作用
物理
计算机视觉
作者
Shuge Tian,Jinyuan Zhang,Fuhua Gao,Da Cai,Yueli Zhang
标识
DOI:10.1016/j.foodchem.2024.138528
摘要
The addition of Sudan dyes with carcinogenic effects to food threatens human health. Herein, a ratiometric fluorescence strip consisting of core–shell upconversion particles (NaYF4:Yb,Tm@NaYF4:Yb,Er), metal–organic frameworks and dual-template molecularly imprinted polymers was developed to selectively and sensitively detect four Sudan dyes based on inner filter effect (detection time only takes 8 min). The high adsorption capacity of metal–organic frameworks and the greater overlap between the emission of NaYF4:Yb,Tm@NaYF4:Yb,Er and the absorbance of four Sudan dyes enable the signal responses to be more sensitive. The limits of detection in chilli powder samples are as low as 29.87 ng/g, 37.55 ng/g, 47.89 ng/g and 51.02 ng/g, with satisfactory recovery (93.32–103.4%) and minor relative standard deviations (≤4.3%). This method broadens the idea for low-cost and portable detection of multiple illegal additives in complex substrates with high selectivity and sensitivity based on one kind of fluorescent strip.
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