Sensitive Spectrophotometric Methods for Thetrace Determination of Residual Chlorine, Chloramine-T And Chloramine-B In Environmental Water Samples

摘要

1986 safe drinking water amendment has reduced the use of chlorine for disinfectants of drinking water and wastewater. Chlorine is one of the most common chemical disinfectants used throughout the world to control the spread of water borne diseases wherein it destroys or deactivates the disease-producing microorganisms. Chlorine may also produce adverse phenomena by intensifying the effects of phenol and other organic compounds present in water supply and may produce potential carcinogens. Although, this has led to great concern over the public health significance of these materials but still the practice of use of chlorine has not been abandoned. Chloramine T (CAT) has been recommended as chlorinating reagent for public water supplies. Chloramine B (CAB) is non-methyl analogue of CAT and posses properties similar to CAT. Hence, it is envisaged that CAB is likely to be potential candidate for chlorination. New methods which do not involve the use of unstable or toxic reagents are developed based on the coupling reaction of N-(1 -napthyl)ethylendiamine dichloride (NEDA) and 3-methyl 2-benzothiazolinone hydrozone hydrochloride (MBTH) are proposed for the determination of residual chlorine, CAT and CAB. The proposed methods using NEDA and MBTH indicated good reproducibility and can be satisfactorily used for the determination of residual chlorine, CAT and CAB.