Determination of pentachlorophenol and tribromophenol in sawdust by ultrasound-assisted extraction and MEKC

作者：Mardones Claudia^*; von Baer Dietrich; Hidalgo Ariela; Contreras Alejandra; Sepulveda Carlos

来源：Journal of Separation Science, 2008, 31(6-7): 1124-1129.

DOI：10.1002/jssc.200700403

• MEKC
• pentachlorophenol
• sawdust
• tribromophenol
• ultrasound

An ultrasonic bar-assisted extraction and CE separation procedure for the determination of pentachlorophenol (PCP) and 2,4,6-tribromophenol (TBP) residues in sawdust was developed and applied. For this purpose, micellar electrokinetic capillary chromatography (MEKC) was used and compared with a GC/MS methodology. This methodology allowed the quantification of PCP and TBP in a concentration range of 2.5 - 12.0 mg/kg for TBP and 2.8 - 12.0 mg/ka for PCP. Different sample treatment processes were evaluated in order to extract these compounds from sawdust. Better results were obtained when the residues were extracted with ultrasound-assisted hexane, filtered, evaporated, dissolved in Na2CO3, and injected into the CE equipment. The optimal option for GC/MS was extraction with Na2CO3 followed by a derivation using acetic anhydride and liquid-liquid extraction with hexane. This method allowed the quantification of TBP and PCP in sawdust in a concentration range of 0.19-12.00 mg/kg and 0.14-12.00 mg/kg, respectively. The CE method was compared with the GC/MS as reference method. The results were shown to be statistically similar by both methods for PCP as well as for TBP.

• 出版日期2008-4