化学
比色法
单宁酸
荧光
亚硝酸盐
线性范围
检出限
纳米颗粒
色谱法
硝化作用
纳米技术
有机化学
硝酸盐
材料科学
物理
量子力学
作者
Xiaohui Hao,Ao Shen,Mengwen Li,Ruochen Duan,Lala Hou,Xiaoling Zhao,Ziqi Li,Yongwei Zhao,Panqing Zhang,Xuebing Wang,Xue Li,Yunxu Yang
标识
DOI:10.1016/j.aca.2023.341280
摘要
The nitration reaction of nitrite and phenolic substances was first used to identify and detect NO2− by taking fluorescent poly (tannic acid) nanoparticles (FPTA NPs) as sensing platform. With the low cost, good biodegradable and convenient water-soluble FPTA NPs, a fluorescent and colorimetric dual modes detecting assay was realized. In fluorescent mode, the linear detection range of NO2− was 0–36 μM, the LOD was as low as 3.03 nM, and the response time was 90 s. In colorimetric mode, the linear detection range of NO2− was 0–46 μM, and the LOD was as low as 27 nM. Besides, a smartphone with FPTA [email protected] agarose hydrogel formed a portable detection platform to test the fluorescent and visible color changes of FPTA NPs for NO2− sensing as well as for accurate visualization and quantitative detection of NO2− in actual water and food samples.
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