The concentration of dispersed oil and grease (O&G) in water is an important parameter for water quality and safety. This paper presents analysis of O&G in water and waste water using FTIR with respect to IS 3025 (Part 39) with Shimadzu IRAffinity-1. The above method is based on Hexane as an extraction solvent, which as a hydrocarbon containing solvent interfere with the FTIR analysis in determination of O&G.
Hence, this method is developed using carbon tetrachloride as an extraction solvent. Carbon tetrachloride is proved to be a suitable alternative to Hexane and the method has shown sufficient sensitivity for monitoring O& G in water as specified by IS 3025 (Part 39).