提出了顶空-气相色谱-质谱法（HS-GC-MS）测定组合聚醚中二氟一氯甲烷（HCFC-22）、一氟三氯甲烷（CFC-11）和一氟二氯乙烷（HCFC-141b）等3种发泡剂的含量。取样品经甲醇溶解后置于顶空瓶中，加入2 000 mg·L^-1一溴一氯甲烷内标溶液0.1 mL，于60 ℃下顶空振荡萃取10 min。选用GS-GasPro色谱柱（60 m×0.32 mm）分离，采用全扫描模式进行测定。HCFC-22、CFC-11、HCFC-141b的线性范围均为5~100 μg，检出限（3.143s）均为0.2 μg·g^-1。方法用于组合聚醚样品分析，加标回收率为82.0%~106%，测定值的相对标准偏差（n=6）为2.5%~11%。

A method of headspace-gas chromatography-mass spectrometry (HS-GC-MS) was proposed for the determination of 3 foaming agents, i.e. HCFC-22, CFC-11 and HCFC-141b in combined polyether polyols. The sample was dissolved in methanol, and placed in the HS-flask with adding 0.1 mL of 2 000 mg·L^-1 monobromochloromethane solution as internal standard. The mixture was extracted by headspace oscillation for 10 min at the temperature of 60℃. GS-GasPro chromatographic column (60 m×0.32 mm) was used for the separation, and full scan mode was adopted in the determination. Linearity ranges of HCFC-22, CFC-11 and HCFC-141b were found in the same range of 5-100 μg, with their detection limits (3.143s) of 0.2 μg·g^-1. The proposed method was applied to the analysis of samples of combined polyether polyols, and values of recovery found by standard addition method were ranged from 82.0% to 106%, with RSDs (n=6) in the range of 2.5%-11%.