GC Determination of Residual Amount of Carbon Tetrachloride in Drinking Water with Hollow Fibrous Membrane-Liquid Phase Micro-extraction

GC was used in the determination of residual amount of carbon tetrachloride in drinking water. The sample was extracted by hollow fibrous membranes-liquid phase micro-extraction (HFM-LPME) with toluene as extraction solvent. The extraction was carried out under magnetic stirring for 20 min, at the rate of 600 r·min-1 and at the temperature of 20 ℃. Under the optimal conditions, linear relationship between values of peak area and mass concentration of CCl4 was kept in the range of 12.5-150 μg·L-1, with detection limit (3S/N) of 0.2 μg·L-1. Tests for recovery and precision were made by standard addition method and values of recovery and RSD′s (n=6) found were in the ranges of 97.5%-102.0% and 2.8%-3.3% respectively.