Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 50,
  • Issue 7,
  • pp. 866-870
  • (1996)

Use of Fluorescence Spectroscopy in Concentration and Supersaturation Measurements in Citric Acid Solutions

Not Accessible

Your library or personal account may give you access

Abstract

Measurement of supersaturation is of critical importance in the operation and control of crystallizers. In this work, we report a novel spectroscopic technique to achieve the measurement of concentration and supersaturation in crystallizing solutions. In order to develop a sensor for this measurement, citric acid is chosen as the model solute, and the analytical technique involves fluorescence spectroscopy. Citric acid is a common food-grade compound with a wide range of applications that is exclusively produced by crystallization. The fluorescent properties of a probe, 8-hydroxy-1,3,6-pyrenetrisulfonate (pyranine), are used to provide concentration measurements in aqueous citric acid solutions, thereby providing for supersaturation estimation. The change in the relative emission peak intensities of the probe in different solute concentrations gives an excellent calibration curve for concentration measurements. It is also shown that, although pyranine responds to both its solvent microenvironment and the pH of the solution, it is still possible to measure concentration and supersaturation by using this fluorescence technique.

PDF Article
More Like This
Water vapor concentration measurement in air using filament-induced fluorescence spectroscopy

Tie-Jun Wang, Huailiang Xu, Jean-François Daigle, Aravindan Sridharan, Shuai Yuan, and See Leang
Opt. Lett. 37(10) 1706-1708 (2012)

Measurement of surface concentration of fluorophores by fluorescence fluctuation spectroscopy

A. Delon, J. Derouard, G. Delapierre, and R. Jaffiol
Opt. Lett. 31(8) 1142-1144 (2006)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved