An Improved Accurate Method for The Automated Determination of Residual Chlorine in Saline Water
More details
Hide details
Department of Analytical Chemistry. Faculty of Marine and Environmental Sciences. University of Cádiz. 11510 Puerto Real, Cádiz, Spain
Carlos Moreno   

Department of Analytical Chemistry. Faculty of Marine and Environmental Sciences. University of Cádiz. 11510 Puerto Real, Cádiz, Spain. Phone: +34‐956‐016433 Fax: +34‐956‐016460
Online publication date: 2006-06-01
Publication date: 2006-06-01
Eurasian J Anal Chem 2006;1(1):1–10
The determination of residual chlorine with o-tolidine in saline water has been studied. The method proposed is based on the use of reverse flow injection analysis for the monitoring of chlorine in saline samples with low cost and reduction of waste production. The linearity of the method (up to 1.8 mg L-1) covers the chlorine concentrations used in most water treatment processes. The precision of the method was 0.93 % (RSD) for 1.4 mg L-1 chlorine. The method is also applicable to non-saline water and the limits of detection were 0.11 mgL-1 and 0.04 mg L-1 for saline and non-saline matrices, respectively. The method has been successfully applied to the analysis of residual chlorine in both synthetic and real samples. The sample throughput was 60 h-1.
Tebbut T H Y (1995) Fundamentos de Control de la Calidad del Agua (Spanish Edition), Ed. Limusa, México D.F.
New York State Department of Health (Spanish Edition) (1995) Manual de Tratamiento de Aguas Negras, Ed. Limusa, México D.F. Eurasian J. Anal. Chem. / Vol:1, No:1, 2006 9.
Estrada P (1986) Manual de Control Analítico de la Potabilidad de las Aguas de Consumo Humano, Ed. Díaz de Santos, Madrid.
Shams El Din A M, Arain R A and Hammoud A A (2000) On the chlorination of seawater. Desalination 129: 53.
Saad B, Wai W T, Jab S, Ngah W S W, Saleh M I and Slater J M (2005) Development of flow injection spectrophotometric methods for the determination of free available chlorine and total available chlorine: comparative study. Anal Chim Acta 537: 197.
Saad B, Wai W T, Ali A S M and Saleh M I (2006) Sequential flow injection determination of chlorine species using a triiodide-selective electrode detector. Anal Sci 22: 45.
Pinkernell U, Nowarck B, Gallard H and Von Gunten U (2000) Methods for the photometric determination of reactive bromine and chlorine species with ABTS. Water Res 34: 4343.
Irons G P and Greenway G M (1995) Investigation into the detection of chlorine species by rhodamine 6g chemiluminescence with electrochemical modification. Analyst 120: 477.
Greenberg A E, Clesceri L S and Eaton A D (1992) Standard Methods for the Examination of Water and Wastewater, 18th Ed., American Public Health Association, Washington.
ASTM Standards (1996) Water and Environmental Technology, Vol. I, D 1253-86, Easton.
March J G, Gual M and Simonet B M (2002). Determination of residual chlorine in greywater using o-tolidine. Talanta 58: 995.
Moberg L and Karlberg B (2000) An improved N,N '-diethyl-p-phenylenediamine (DPD) method for the determination of free chlorine based on multiple wavelength detection. Anal Chim Acta 407: 127.
Malik A U, Ahmad S, Andijani I and Al-Fouzan, S (1999) Corrosion behavior of steels in Gulf seawater environment. Desalination 123: 205.