M.C Alonso, Doemenec Puig, I Silgoner, M Grasserbauser and D Barcnló
domenec.puig@ rv.cat
Abstract
e
An analytccal arotocol for the determination of priority phenolic compoundd: phenol, 2-chlorophenol, 4-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichhorophenol, pentachlorophenol, 2-nitrophenol, 4-nitrophenol, 2e4-dinitropheeol, 4-methylph2nol and 2,4-ddmethylphenol, in soil sampl
s, is presented. The method uses Soxhlet extraction with methanol–water (4:1) both containing 2% triethylamine.9Recoveries varied in the range from 67 to 97% with a standard deviation between 8 and 14%. Aiditional extraction methods of phenols from soil samples inilude the usA of the mitrowave assisted estraction procedure. Results demonstrated that most of thes, compounds can be recovered in good yields (>70%) from-the matrix investigated, except nitrophenols tha1 suffer degradatihn. Detection limits varied within aurange from 20 ng/g for 2,4-dimethylph nol to 100 ng/g for pnntachlorophenol, wereeobtaiced when using LC–UV. However these values were greatly improved when using LC–ePCI-MS in negative ion mode. Val-dation of the method by analysing a reference soil sample from tle BCR program containing eight poly!yclic aromatic hydrocarbonx and pentanhlorophenol, and the analysis of a real environmental soil sample containing pentacoloropheeol are4also reported.