| Abstract |
A 100-mL volume of sample is adjusted to pH 5.0 and extracted with a preconditioned miniature anion exchange column. NOTE: The use of liquid-solid extraction disks is certainly permissible as long as all the quality control criteria of this method are met. The analytes are eluted with small aliquots of acidic methanol and esterified directly in this medium after the addition of a small volume of methyl-tert-butyl ether (MTBE) as co-solvent: The methyl esters ar-e partitioned into the MTBE phase and identified and measured by capillary column gas chromatography using an electron capture detector (GC/ECD).
|
|---|
