TITLE

Online phototransformation—flow injection chemiluminescence determination of triclosan

AUTHOR(S)
Shujuan Song; Qi Jun Song; Zhongliang Chen
PUB. DATE
April 2007
SOURCE
Analytical & Bioanalytical Chemistry;Apr2007, Vol. 387 Issue 8, p2917
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A highly selective and sensitive chemiluminescence method for the determination of triclosan is proposed. The method is based on the phototransformation of triclosan to a light-emitting precursor in the presence of fluorescein in alkaline medium and the chemiluminescence reaction is then triggered by strong base or oxidants such as N-bromosuccinimide. Based on this reaction an online phototransformation–flow injection manifold was developed, in which the photoreactor comprises a 150-cm-long × 0.8-mm-i.d. piece of PTFE tubing coiled around a 25-W fluorescent lamp, and the phototransformed products were then injected into a carrier stream of borate buffer. After mixing with the oxidant stream the produced light was detected by a photomultiplier. A wide calibration range from 8.0 × 10−8 to 1.0 × 10−4 mol L−1 was obtained under the optimized conditions, and the detection limit was as low as 5.0 × 10−8 mol L−1. The whole process of analysis, including the online phototransformation and subsequent chemiluminescence detection, could be completed in 6 min. Most of the foreign substances tested showed high tolerance levels, and the proposed method was directly applied to the determination of triclosan in toothpaste samples without any pre-separation procedure. [Figure not available: see fulltext.]
ACCESSION #
24441170

 

Related Articles

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics