Measuring for OBA (Optical Brightening Agents)
Optical Brightening Agents (OBAs) are a class of fluorophores that emit light in the blue range (415-445nm) and are commonly added to modern laundry detergents to compensate for discolouration of clothing with age. Due to mixing of grey - and wastewaters in most residential plumbing systems, OBAs can be detected in both septic tanks and sewage systems. Hence, measurement of OBA fluorescence can be used to track polluting organic matter sources.
