An investigation into the analytical methods for the determination of selected chlorinated phenols in aqueousphase

The objective of this study was to optimize an analytical method for the analysis of selected chlorinated phenols (2-chlorophenol [2-CP], 2,4-dichlorophenol [2,4-DCP], 2,4,6-trichlorophenol [2,4,6-TCP] and pentachlorophenol [PCP]) in wastewater. Following the EPA Method 604, the optimum analytical method consisted of procedures including a liquid-liquid extraction (LLE) (n-hexane as an organic solvent), a derivatization (according to acylation technique by using of pentafluorobenzoylchloride (PFBC1), a clean-up procedure (silica gel, deactivated with 2 % water, as a sorbent material) and GC-ECD quantification. When including each of these above steps in the analytical procedure, the recovery rates of target compounds were obtained to be > 80 % (RSD: < 10 %, [n=3]).