AWWA WQTC71465

This powerpoint presentation begins by providing a brief overview of the formation of iodinated disinfection byproducts (DBPs) and Electrospray Ionization-Triple Quadrupole MassSpectrometry (ESI-tqMS). Study objectives were to: optimize the ESI-tqMS precursor ion scan of126.9 with iodine-containing standard compounds; detect and identify polar iodo-DBPs insimulated drinking water with the aid of UltraPerformance Liquid Chromatography (UPLC); and, compare the formation of polar iodo-DBPs inchlorination and chloramination. Materials included: a standard solution of3-iodopropionic acid (TCI);3,5-diiodosalicylic acid, 3,5-diiodo-L-tyrosine,and 2,4,6-triiodophenol (ChemService);(E)-3-(5-iodo-2-furyl)prop-2-enoic acid, and3-iodophthalic acid (Maybridge), dissolved in 1:1 water/acetonitrile at aconcentration of 1 mg/L each. Materials also included: natural organic matter - Suwannee River Fulvic Acid (SRFA) andSuwannee River Humic Acid (SRHA); methyl tert-butyl ether (MTBE, Aldrich) andacetonitrile (ACN, SAJ) were of HPLC grade, all chemicals were of reagent grade. Methods included: total organic iodine (TOI) -a precombustion station (AQF-100, Mitsubishi) withESI-tqMS (waters) using selected ion recording (SIR)of m/z 126.9; chlorine - USEPA method 4500-Cl F; ESI-MS/MSfull scanprecursor ion scanproduct ion scan; and, UPLC-ESI-MS/MSselected ion recording (SIR)precursor ion scanproduct ion scan. Includes figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2009

Number of Pages:

38

File Size:

1 file , 1.4 MB