Detection of Histamine Based on Gold Nanoparticles with Dual Sensor System of Colorimetric and Fluorescence
- PMID: 32182887
- PMCID: PMC7143402
- DOI: 10.3390/foods9030316
Detection of Histamine Based on Gold Nanoparticles with Dual Sensor System of Colorimetric and Fluorescence
Abstract
Gold nanoparticles (Au-NPs), with the dual sensor system of colorimetric and fluorescence responses, were developed for the determination of histamine as a spoilage monitor for distinguishing lifetime and freshness of aquatic products. Upon addition of histamine, the absorption coefficient orders of magnitude via the interaction of free electrons and photons were affected, and the characteristic absorption peak of Au-NPs was red-shifted from 520 nm to 664 nm. Meanwhile, the large amino groups in the networks of histamine-Au-NPs with high molecular orbital exhibited excellent fluorescence behavior at 415 nm. Au-NPs offered a range of 0.001-10.0 μM and 0.01-1.0 μM with a limit of detection of 0.87 nM and 2.04 nM by UV-vis and fluorescence spectrum assay, respectively. Moreover, Au-NPs could be used to semiquantitatively analyze histamine with the naked eye, since the significant colorimetric and fluorescence reaction of Au-NPs solution that coincided with different concentrations of histamine can be observed as the histamine concentration was 0.1-1.0 μM. Both of the dual-sensor systems of Au-NPs were successfully applied to the quantitative analysis of histamine in fresh salmon muscle, suggesting the simplicity and rapidity in the dual detection approaches of Au-NPs might be suitable for spoilage assay of aquatic food to ensure food safety.
Keywords: UV-visible and fluorescence; gold nanoparticles; histamine; spoilage marker; visual detection.
Conflict of interest statement
All authors declare no conflict of interest.
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