International Journal of Engineering and Information Systems (IJEAIS)   Year: 2017 | Volume: 1 | Issue: 5 | Page No.: 9-13 Development of Colorimetric Analysis for Determination the Concentration of Oil in Produce Water Suliman, M. S., Yasin, Sahl, Ali, Mohamed S. Abstract: In the present study simple, sensitive, specific and validated colorimetric method has been developed for the quantitate estimation of oil in produce water, there are many methods to determine oil in water such as gas chromatography, flame ionization detection and so, samples prepared to colorimetric analysis by execrated oil from produce water, the concentration of samples were found by density of crude oil in range of 100-250 mg/L, with correlation coefficient closed to 0.9983, 0.9993, 0.9988 and 0.9999, the method was validated for linearity and accuracy. The relative error % for estimation of oil in water (OIW) were found as 29.89, - 31.504 and7.025 for light, heavy extracted crude oil respectively. Proposed method was successfully applied for the quantitative estimation of oil in produced water.