OPTIMIZATION OF SOLID-PHASE EXTRACTION METHOD FOR ANALYSIS OF LOW-PPBAMOUNTS OF ALDEHYDES-OZONATION BY-PRODUCTS

Ozonation is commonly used in drinking water treatment technology. Ozo ne reacts with natural organic substances present in water to produce a number of by-products. Aldehydes are the important class of ozonatio n byproducts due to their health effects. The determination of aldehyd es in water by conventional analytical techniques is difficult because they are polar, unstable and exist at low concentration. A modern met hod for the determination of aldehydes in drinking water applies deriv atization with O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine (PFBOA) an d liquid-liquid extraction (LLE). The objective of this study was to i mprove the method by application of solid-phase derivatization and ext raction. C-18, C(18)polar plus and Phenyl Baker SPE sorbents were used for simultaneous derivatization and enrichment of aldehydes. Detectio n limits with GC-electron-capture detection technique were in the low ppt range.