M. Alonso, D. Puig, I. Silgoner
Oct 9, 1998
Citations
0
Influential Citations
83
Citations
Quality indicators
Journal
Journal of Chromatography A
Abstract
Abstract An analytical protocol for the determination of priority phenolic compounds: phenol, 2-chlorophenol, 4-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol, pentachlorophenol, 2-nitrophenol, 4-nitrophenol, 2,4-dinitrophenol, 4-methylphenol and 2,4-dimethylphenol, in soil samples, is presented. The method uses Soxhlet extraction with methanol–water (4:1) both containing 2% triethylamine. Recoveries varied in the range from 67 to 97% with a standard deviation between 8 and 14%. Additional extraction methods of phenols from soil samples include the use of the microwave-assisted extraction procedure. Results demonstrated that most of these compounds can be recovered in good yields (>70%) from the matrix investigated, except nitrophenols that suffer degradation. Detection limits varied within a range from 20 ng/g for 2,4-dimethylphenol to 100 ng/g for pentachlorophenol, were obtained when using LC–UV. However these values were greatly improved when using LC–APCI-MS in negative ion mode. Validation of the method by analysing a reference soil sample from the BCR program containing eight polycyclic aromatic hydrocarbons and pentachlorophenol, and the analysis of a real environmental soil sample containing pentachlorophenol are also reported.