HOW OIL-IN-WATER MONITORING WORKS
Oils rich in polyaromatic hydrocarbons (PAH) will fluoresce when illuminated with ultraviolet light. Fluorescence occurs when a substance absorbs light at one wavelength then re-emits the light at a longer wavelength. Typical oils that fluoresce include fuel oil, petrol, diesel, crude oil, hydraulic oil, and transformer oil. Each of these has its own unique fluorescence intensity caused by its specific PAH content. The combined fluorescence from both dissolved and dispersed oil in water can be measured and then correlated to the oil content. Entrained gas and solids present in the stream will not fluoresce and, therefore, do not affect the measurement.
Non-mineral oils, such as vegetable oil, or hydrocarbons low in aromatic content may not fluoresce in the presence of UV light. However, water becomes visually turbid or cloudy when contaminated with non-soluble oils, and this turbidity can be measured to monitor their presence. Therefore, turbidity is directly proportional to the concentration of these non-soluble contaminants.
SOUTH FORK INSTRUMENTS CAN HELP SOLVE THE CHALLENGES YOU FACE WITH OIL-IN-WATER MEASUREMENTS
Contact South Fork Instruments to find out how our experience and understanding of complicated processes can facilitate the development of practical solutions for your measurement needs.