Abstract
The change in the absorbance upon chlorination (the differential absorbance, Δ A) of natural organic matter (NOM) that has been concentrated, isolated, and/or fractionated from five sources was explored as a possible indicator of the formation of total organic halogen (TOX) in the samples. The results demonstrate that concentration and isolation of NOM using techniques that are currently in widespread use does not significantly alter the TOX–Δ A 272 relationship that applies to the unprocessed NOM. However, when such samples are fractionated, the TOX–Δ A 272 relationships for the different fractions are not identical. In particular, when the hydrophobic and hydrophilic neutral fractions of NOM are chlorinated, the amount of TOX formed per unit of A 272 destroyed is significantly larger than the corresponding value for other NOM fractions. This observation might reflect the relatively high content of proteins and other amino acid structures that can be disinfection by-product precursors but that absorb little or no light at 272 nm.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
