Molecularly imprinted ratiometric fluorescence sensor for visual detection of 17β-estradiol in milk: A generalized strategy toward imprinted ratiometric fluorescence construction

被引:7
作者
Wang, Na [1 ]
Li, Huiru [2 ]
Tian, Yanbo [2 ]
Tan, Liju [2 ]
Cheng, Shuzhen [2 ]
Wang, Jiangtao [1 ,2 ]
机构
[1] Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China
[2] Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Peoples R China
关键词
Ratiometric fluorescence; Visualization; 17; beta-Estradiol; Milk analysis; Estriol; CDTE QUANTUM DOTS; CARBON-DOTS; POLYMERS; 17-ALPHA-ETHINYLESTRADIOL; COMPOSITES; WATER;
D O I
10.1007/s00604-024-06329-w
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
17 beta-Estradiol (E2) is the typical endocrine disruptor of steroidal estrogens and is widely used in animal husbandry and dairy processing. In the environment, even lower concentrations of E2 can cause endocrine dysfunction in organisms. Herein, we have developed a novel molecularly imprinted ratiometric fluorescent sensor based on SiO2-coated CdTe quantum dots (CdTe@SiO2) and 7-hydroxycoumarin with a post-imprint mixing strategy. The sensor selectively detected E2 in aqueous environments due to its two fluorescent signals with a self-correction function. The sensor has been successfully used for spiking a wide range of real water and milk samples. The results showed that the sensor exhibited good linearity over the concentration range 0.011-50 mu g/L, obtaining satisfactory recoveries of 92.4-110.6% with precisions (RSD) < 2.5%. Moreover, this sensor obtained an ultra-low detection limit of 3.3 ng/L and a higher imprinting factor of 13.66. By using estriol (E3), as a supporting model, it was confirmed that a simple and economical ratiometric fluorescent construction strategy was provided for other hydrophobic substances.
引用
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页数:11
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