Chemical Oxygen Demand (COD) is a term used to measure the quality of effluent water. It is a measure of water pollution resulting from organic matter and is being extensively used by industry to test their waste water before releasing it to the environment.
Though there are many chemical methods of analysis for this purpose, they are both time consuming and require quite a large amount of sample & correspondingly large amount of reagent chemicals most of which are highly toxic and carcinogenic.
In view of the stringent pollution control norms there is an urgent need for a fast and cost effective analytical instrument to keep track of the effluent water at different stages of its treatment process. To meet this demand by chemical industry, United Phosphorus Ltd. has come out with a portable and microprocessor based instrument for the measurement of COD in effluent water. The instrument cuts down the analysis time from the present four to five hours to less than two hours. It requires ten times less sample and correspondingly less amount of chemical reagents cutting down the cost of analysis by ten times. The instrument is based on non-dispersive absorption spectrometry and is moderately priced and is being marketed by United Phosphorus Ltd.
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