| Headspace capillary gas chromatography method for the simultaneous determination of acetone in water,methanol and acetonitrile,determined by headspace equilibrium temperature is 95 ℃,the balance time is 30 min,sodium chloride concentration was 200 g/L.Acetone,methanol and acetonitrile in 0.500 mg/L～5.00 mg/L range of good linearity,detection limit were 0.02 mg/L,0.10 mg/L and 0.04 mg/L,RSD of replicate samples of standard ≤3.0%,two mass concentration levels of blank recoveries ranged from 90% to 108%.BTEX does not affect the the determination results.Pyridine can affect the determination of methanol. |
