Flow-Injection Chemiluminescence Sensor for the Determination of Free Chlorine in Tap Water
作者:
Wei Qin,
Zhujun Zhang,
Shuna Liu,
期刊:
Analytical Letters
(Taylor Available online 1997)
卷期:
Volume 30,
issue 1
页码: 11-19
ISSN:0003-2719
年代: 1997
DOI:10.1080/00032719708002286
出版商: Taylor & Francis Group
关键词: chemical sensor;chemiluminescence;flow-injection;free chlorine
数据来源: Taylor
摘要:
A novel chemiluminescence(CL) sensor combined with flow-injection analysis has been developed for determining free chlorine in tap water. The analytical reagent luminol was immobilized on an anion exchange resin column. While a volumn of sodium hydroxide passed through the column, luminol was eluted from the resin in alkaline aqueous solution and then mixed with a sample stream to react and produce CL. The CL emission intensity was correlated with the standard ClO−concentration in the range 1×10−8to 4×10−5g ml−1, and the detection limit was 8×10−9g ml−1ClO−. Interfering metal ions present in water were effectively separated by a pre-column cation exchanger. A complete analysis, including sampling and washing, could be performed in 1 min with a relative standard deviation of less than 5%. The sensor was stable for over 200 times and has been applied successfully to the determination of ClO−in tap water.
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