Determination of turpentine in environmental air and indoor air by solid adsorption-ther-mal desorption/gas chromatography-mass spectrometry
Objective:An analytical method for the determination of turpentine in both ambient and indoor air by solid adsorption-thermal desorption/gas chromatography-mass spectrometry(GC-MS)was developed.Methods:In this work,the influence of desorption temperature,resolution time,desorption flow rate,focusing temperature and cold trap desorption time on the analytical results was investigated and the optimal optimization conditions were set as ad-sorbent tube desorption temperature of 280℃,resolution of 3 min,desorption flow rate of 30 mL/min,cold trap desorp-tion temperature of 300℃,cold trap focusing temperature of-10℃ and cold trap desorption time of 3 min.Results:The calibration curves demonstrated a linear relationship within the range of 5～100 ng,and the limits of detection(LOD)were 0.5µg/m3.The RSDs between laboratories were lower than 5％,and the recoveries of ambient air spiked samples varied from 86.8％to 107％,with an inter-laboratory spiked recoveries RSD of 7.60％.The spiked recoveries of air samples ranged from 74.5％to 109％,with an inter-laboratory relative deviation of spiked recoveries of 11.2％.Conclusion:The method is efficient and simple,as it does not require organic solvents,and is suitable for quickly mea-suring and analyzing turpentine in both indoor and outdoor air.It has high reproducibility,accuracy,and precision.
Automated thermal desorptionGas chromatography and mass spectrometryTurpentineEnviron-mental airIndoor air
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