Citation: Shu Na LIU, Wei QIN, Zhu Jun ZHANG. Flow-injection Chemiluminescence Sensor for the Determination of Free Chlorine in Tap Water[J]. Chinese Chemical Letters, ;1996, 7(11): 1023-1026. shu

Flow-injection Chemiluminescence Sensor for the Determination of Free Chlorine in Tap Water

Department of Chemistry Shaanxi Normal University Xi'an 710062

Received Date: 28 May 1996

Fund Project: This study was supported by the National Natural Science Foundation of China.

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 volume of the sodium hydroxide passed the column,luminol was eluted from the resin in alkaline aqueous solution and then mixed with the sample stream to react and produce Cl.The Cl emission intensity was correlated with the standard C10^- concentration in the range of 1×10^-3 to 4×10^-5 g ml^-1,and the detection limit was 8×10^-9g ml^-1 C10^-.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 C10^- in tap water.
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