API PUBL 4698-1999

$37.70

A Review of Technologies to Measure the Oil and Grease Content of Produced Water from Offshore Oil and Gas Production Operations

Published By	Publication Date	Number of Pages
API	1999	130

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Category: API

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Description

The traditional monitoring methods for monitoring oil and grease, EPA Methods 413.1 and 413.2, rely on Freon 113doubt extraction of oil and grease. Owing to the phase-out of Freon 113 doubt use mandated by the Montreal Protocol and 1990 Clean Air Act Amendments, these methods can no longer be considered viable and hence a new method must be sought. This study identified and evaluated practical alternative methods for routine offshore monitoring of oil and grease in produced waters. Three methods were addressed in this study: 1) an infrared absorption method in which transmitted infrared radiation is measured and correlated to the oil and grease content; 2) an infrared absorption method in which reflected infrared radiation is measured and correlated to the oil and grease content; and 3) an ultraviolet fluorescence (UV) method in which the fluorescent radiation from the sample or sample extract is measured at a specific wavelength and correlated to the oil and grease content. The two infrared absorption methods employed two different configurations of a particular analytical instrument, and the ultraviolet fluorescence method was conducted using two different analytical instruments. All instruments and methods were found capable of measuring oil and grease in produced water. They demonstrated acceptable performance in terms of linear response, analytical sensitivity, sensitivity to changes in crude oil composition, interferences, flexibility, ease of use, and correlation of results to the EPA hexane extraction method, EPA Method 1664.

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