肉眼
比色法
化学
色谱法
超细纤维
滤纸
滤波器(信号处理)
分析化学(期刊)
检出限
计算机科学
有机化学
计算机视觉
作者
Shuangshou Wang,Lu Zhang,Qiwen Jin,Zhongqiu Xu,Jiayi Zhao,Yaping Ding,Wenzhi Li,Lin Peng,Jing Gu,Qi Zhang,Yang Chen,Hongmei Chen,Tingxuan Yan
出处
期刊:Food Chemistry
[Elsevier]
日期:2022-10-01
卷期号:390: 133087-133087
被引量:19
标识
DOI:10.1016/j.foodchem.2022.133087
摘要
A filter paper-based colorimetric strategy for instrument-independent visual detection of artificial food colorants (FCs) was developed in this study. Indicator papers were prepared via the one-step polycondensation of silane coupling agents onto glass microfiber filter papers, and colorimetric cards with a fine one-to-one correspondence between their colors and FCs concentrations were straightforward obtained by the extraction of FCs with indicator papers by virtue of electrostatic interaction and hydrophobic effect. Filter papers post-modified via such a simple way were proved to be of improved binding class selectivity and colorimetric sensitivity, allowing for in-situ colorimetric assay of FCs in an unprecedently wide range of applicable pH (1.0-12.0) with high reliability and fine versatility. Finally, the semiquantitative naked-eye determination of FCs (Allura red, brilliant blue and sunset yellow) in real-world drink samples was experimentally confirmed to be feasible by comparison with the findings of UV-vis absorption spectra, HPLC and mass spectra.
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