期刊
FOOD CHEMISTRY
卷 331, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2020.127359
关键词
Cyanide; Fluorescent probe; Ratiometric fluorescence; NIR fluorescence; Test strip
资金
- National Natural Science Foundation of China [21874059]
- Foundation of Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, Qingdao University of Science and Technology [SATM201807]
Cyanide is a highly toxic anion. Nonetheless, many food plants could produce endogenous cyanide, which causes great danger to human health. Thus, monitoring cyanide in food samples is critically significant. Herein, we rationally developed the first ratiometric near-infrared fluorescent probe for sensing cyanide in food samples. The probe displayed noticeable fluorescence in near-infrared region. Moreover, upon treatment with cyanide, the probe exhibited highly selective and sensitive ratiometric fluorescence response, with limit of detection determined to be 0.075 mu M and limit of quantification determined to be 0.25 mu M. The ratios of fluorescent intensities at 519 and 688 nm (I-519/I-688) was linear with added cyanide concentrations from 0 to 80 mu M. The relative standard deviations for repeatability and reproducibility varied from 0.55 to 8.94 and from 1.17 to 9.46, respectively. Significantly, probe Hy has been successfully applied for monitoring cyanide in various food samples, such as almonds, sprouting potatoes, and bamboo shoots.
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