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Examining the Use of UV‐254
Author(s) -
Sung Windsor
Publication year - 2008
Publication title -
opflow
Language(s) - English
Resource type - Journals
eISSN - 1551-8701
pISSN - 0149-8029
DOI - 10.1002/j.1551-8701.2008.tb01962.x
Subject(s) - ultraviolet , sample (material) , ozone , wavelength , natural organic matter , absorption (acoustics) , chemistry , analytical chemistry (journal) , optics , environmental science , materials science , optoelectronics , environmental chemistry , organic matter , physics , chromatography , organic chemistry
This article discusses ultraviolet (UV) light absorption at 254 nm as a useful measurement that serves as a surrogate test for reactive natural organic matter (NOM). Operators can measure the UV‐254 of a sample with a spectrophotometer in less than 15 minutes by measuring the intensity of UV light at the proper wavelength before and after it passes through a water sample in a cell of known path length (usually 1 or 10 cm). Applying UV‐254, predicting THM4 formation, predicting 90th percentile lead, required ozone dose, and UV‐254 recommendations are all discussed.