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Journal of Spectroscopy
Volume 2016 (2016), Article ID 8416869, 6 pages
http://dx.doi.org/10.1155/2016/8416869
Research Article

Study on the Fluorescence Spectra Characteristics of Vinegar-Water Solutions

Dan Li,1,2 Xuan Wang,1,2 and Caiqin Han1,2

1School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
2Jiangsu Key Laboratory of Advanced Laser Materials and Devices, Jiangsu Normal University, Xuzhou 221116, China

Received 29 November 2015; Accepted 6 April 2016

Academic Editor: Maria Carmen Yebra-Biurrun

Copyright © 2016 Dan Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Fluorescence spectra and polarization spectra of vinegar-water solutions with different concentration of CH3COOH have been studied. The characteristics and mechanism of fluorescence spectra are discussed, and polarization degree is calculated. Vinegar-water solutions are excited by ultraviolet (UV) light at 380 nm. The characteristic fluorescence peaks of the solution were identified at 445 nm and 470 nm. The type of emission fluorescence is . With the increasing concentration of CH3COOH/pH value, the peak intensity is enhanced first, and then fluorescence quenching occurs. The polarization degree confirms the molecular orientation of different sample solutions. This research provides theoretical and experimental basis for the physical/chemical properties and quality of vinegar detection by florescence spectroscopy.