自制的SPME装置与GC-MS联用测定室内空气中的挥发性有机化合物

Determination of VOCs in Indoor Air by Self-made SPME Devices Coupled with GC-MS

用直接进样、固相萃取进样和自制的固相微萃取（SPME）装置进样与气相色谱（GC）及GC—MS联用检测了室内空气中的挥发性有机污染物，对影响SPME操作条件进行了优化。使用的方法在所测范围内具有良好的线性（相关系数为0．968～0．991），检出限达0．3—2、3μg/L，相对标准偏差均小于7％，回收牢为95％～111％。结果表明：自制的SPME装置操作简单、快速、安全，准确度、灵敏度优于其它两种方法。

Determination of volatile organic chemicals （VOCs） was conducted with self-made solidphase extraction（SPME） devices coupled with GC and GC -MS, and the results were compared with those from conventional sample preparation methods such as solid phase extraction and direct sample injection. The operational conditions of SPME were optimized. The method developed had correlation coefficients of 0. 968 -0. 991, detection limits of 0. 3 -2. 3 μg/L, relative standard deviations less than 7% and recoveries ranging from 95% to 111%. The result showed that the SPME method was simple, fast, safe and accurate, and better than the other methods for comparison.