The content of free acetic acid in cigarette smoke condensates was determined by GC-MS with isopropyl alcohol as the solvent and nonanol as the internal standard.

• 以异丙醇为溶剂；壬醇为内标；采用气相色谱-质谱法分析了卷烟烟气总粒相物中的游离乙酸；乙酸测定结果的相对标准偏差小于1%25；平均回收率为99.；59%25。