How Does Your Laundry Glow?

Richard B. Weinberg
Departments of Internal Medicine and Physiology and Pharmacology, Wake Forest University School of Medicine, Winston-Salem, NC 27157
J. Chem. Educ., 2007, 84 (5), p 800A
DOI: 10.1021/ed084p800A
Publication Date (Web): May 1, 2007

Abstract

This Classroom Activity examines the effect of pH on the fluorescence properties of optical brighteners present in liquid laundry detergent. Students conduct acid titrations in the presence and absence of buffer to determine the pH of the fluorescence color transition. This Activity can be used to explore the principles of acid/base titrations, the action of buffers, and the photophysics of pH-sensitive fluorescent probes.

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  • Received: August 03, 2009

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