GC Determination of Residual Amount of Pentachlorophenol in Wood with Accelerated Solvent Extraction

The content of pentachlorophenol in wood was determined by GC. The sample was extracted statically with ethanol at 100 ℃ for 10 min. DB-5 capillary column and electron capture detector were used for separation and determination.Linear relationship between values of peak area and mass concentration of pentachlorophenol was kept in the range of 0.01-50 mg·L-1, with detection limit (3S/N) of 0.01 mg·kg-1. Using sample of wood as matrix, test for recovery was made by standard addition method, and values of recovery obtained were in the range of 94.2%-98.2%, with values of RSD (n=6) less than 4%.