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

SUBMITTER: Bi J 

PROVIDER: S-EPMC7143402 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature