1. A novel ratiometric near-infrared fluorescent probe for monitoring cyanide in food samples.
- Author
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Long L, Han Y, Yuan X, Cao S, Liu W, Chen Q, Wang K, and Han Z
- Subjects
- Food Contamination analysis, Limit of Detection, Prunus dulcis chemistry, Reproducibility of Results, Sasa chemistry, Sensitivity and Specificity, Solanum tuberosum chemistry, Spectroscopy, Near-Infrared methods, Cyanides analysis, Fluorescent Dyes chemistry, Food Analysis methods
- Abstract
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 μM and limit of quantification determined to be 0.25 μM. The ratios of fluorescent intensities at 519 and 688 nm (I
519 /I688 ) was linear with added cyanide concentrations from 0 to 80 μM. 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., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier Ltd. All rights reserved.)- Published
- 2020
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