Full Description

Significant quantities of largely unidentified byproducts are known to be produced fromthe reactions of ozone and natural organic matter (NOM) during preoxidation treatmentof drinking water. The elucidation of the nature and identity of these ozonation byproductsis hindered by two complicating factors. The first is the inherent aqueoussolubility of many of these compounds, which renders their efficient extraction fromwater difficult to achieve. Second is the lack of established identity of specific potentialbyproducts, which complicates targeted analytical approaches. To overcome thesechallenges, we have approached the task of byproduct identification by methodsinvolving aqueous functional group-specific derivatization reactions.Aqueous functional group-specific derivatizations are described for carbonyls(multifunctional aldehydes and ketones) and epoxides. These procedures enhance theextractability of the analytes and provide an analytical "flag" for the specific compoundclasses. Derivatized compounds are extracted by solid phase extraction (SPE) and, insome cases after further derivatization, analyzed by gas chromatography-massspectrometry (GC-MS). Includes 18 references, figures.

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Edition: Vol. - No. Published: 11/02/2003 Number of Pages: 12File Size: 1 file , 350 KB