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  • Produced Water Report: New infrared methods for analyzing produced water


    S. Rintoul

    Infrared methods for detecting oil in water have been highly useful in oilfield applications for over 20 years. A simple method, a solvent is added to the produced water, which then absorbs the oil. When the solvent sample is exposed to infrared light, the amount of infrared light that is absorbed provides the oil in water measurement. With the manufacture of Freon 113 banned by the Montreal Protocol in 1995, the old ASTM method (D 3921) that used infrared analysis and Freon 113 had to be replaced. These replacements are being refined. The latest updates are discussed. NEW ASTM METHOD D7066-04 Numerous oil and grease applications including EPA Methods 413.2 and 418.1 and ASTM Method D 3921 used Freon as the extraction solvent. Freon 113 has two key characteristics that made it ideal for use as the solvent in Method 418.1: Hydrocarbons have a high solubility in Freon 113...

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