[Gas chromatographic analysis of nicotine in indoor air].

An analytical method for the determination of nicotine in indoor air was developed. Air sample was collected in absorption solution of 1% NaHSO4. After alkalization and heptance extraction, the content of nicotine in the sample was determined by gas chromatography with FID. The average sampling efficiency was 93.6%. The recovery rate was 89.3%-105.5% (mean = 98.4%). The coefficient of variation was 1.7-4.1%. Under the sampling condition the detection limit was 0.01 microgram/m3. After discussing the stability and extraction efficiency of the sample, we found the air sample collected in the absorption solution was stable for at least 7 days in refrigerator. The field experimental results show that the method is simple, reliable and suitable for collecting and determining trace nicotine in indoor air.