Identification and Quantification of Some Chlorinated Phenolics in Wood Pulp Extracts by Gas Chromatography-Time Varied Selected Multiple Ions Mass Spectra

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Abstract
The presence of certain chlorinated phenolics in wood pulp extracts has been addressed. Chemithermomechanical pulps (CTMP) and Kraft (sulphate) pulps are Soxhlet extracted separately with three solvents of different polarity. Thirteen chlorinated compounds are targeted based on their highly probable occurrence in wood pulp mill effluents, e.g. 4- monochloroguaiacol (MCG); 4,5-dichloroguaiacol (DCG), 4,5,6- trichloroguaiacol (TCG); 2-monochlorophenol (MCP); 2,4,6-trichlorophenol (TCP); pentachiorophenol (PCP); 6-monochlorovanillin (MCVN); 4,5-dichlorocatechol (DDC); 3,4,5-trichlorocatechol (TCC); tetrachlorocatechol (TeCC); 4,5-dichloroveratrole (DCV); 3,4,5-trichloroveratrole (TCV); and tetrachloroveratrole (TeCV). Primary analysis of the various extracts is achieved by directly interfacing a gas chromatograph to a mass selective detector (MSD) and operating in a Time Varied Selected Multiple Ions mode. Identifications are made based on a match of the (a) mass spectra, (b) retention time, and (c) chlorine isotopic pattern of the unknown and standard. The quantification of five chlorinated phenolics identified in these extracts is also described.

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