Determination of Turpentine in Water by GC-MS after Headspace and Solid Phase Micro-Extraction Arrow

10.0 mL of the water sample, 3 g of sodium chloride and 10.0 μL of 20.0 mg·L^-1 internal standard solution were added into headspace flask and extracted at 50℃ for 30 min with solid phase micro-extraction arrow head coated with 120 μm divinylbenzene/polydimethylsiloxane. The desorbed gas was separated on DB-1 capillary column, detected by mass spectrometer, and quantified by internal standard method. It was shown that the main component of turpentine was α-pinene, with small amounts of camphene, β-pinene and limonene, and the linear range of standard curve of turpentine was 5.0-100.0 μg·L^-1, with detection limit (3.143s) of 0.6 μg·L^-1. Test for recovery was made on the blank sample by standard addition method, giving results in the range of 95.9%-98.0%, and RSDs (n=6) of the determined values were ranged from 3.7% to 4.3%. This method was applied to analysis of the actual samples, and turpentine was not detected.