Abstract
A chemiluminescence system is described for the specific determination of free chlorine by a reversed flow-injection method. The light emitted from the reaction between Rhodamine 6G and free chlorine (HOCl) under unbuffered conditions allows free chlorine in tap water to be determined with no interference from combined chlorine (chloramines). The limit of determination (signal to noise ratio = 3) is 1 × 10–7M, the linear range is two orders of magnitude, the sampling rate is 240 samples h–1 and the relative standard deviation (n= 10) is 2.0% for 1 × 10–5M free chlorine. Common inorganic species give rise to no light emison. Among oxo acids of chlorine, only chlorite ion slightly elicits light, 1 × 10–3M ClO2– providing a signal 3% of that for 1 × 10–5M HOCl. Inorganic species and chloramines co-existing in tap water do not interfere.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
