摘要
对顶空气相色谱法与液液萃取气相色谱法测定水中松节油的方法进行比较。用Varian CP-Sil 8 CB石英毛细管柱程序升温分离,FID检测,以保留时间定性,外标法定量。顶空气相色谱法的回归曲线相关系数为0.998 5,检出限为0.009 7 mg/L,相对标准偏差为2.3%-3.0%,回收率为104%-106%;液液萃取气相色谱法的回归曲线相关系数为0.998 4,检出限为0.03 mg/L,相对标准偏差为3.8%-4.3%,回收率为92%-94%。实验结果表明,顶空气相色谱法在相关系数、检出限、相对标准偏差、回收率等各方面均优于液液萃取气相色谱法,而且顶空气相色谱法前处理简单,无需使用有机溶剂,简便、快速、准确、重现性好,适合于大量样品的快速分析。
The headspace gas chromatographic method was compared with the liquid-liquid extraction gas chromatographic method for determination of turpentine in water. Turpentine in water sample was separated from each other through Varian CP-Sil 8 CB capillary column 30 m × 0. 25 mm × 0. 25 μm and determined by GC-FID. Retention time of the peaks was used for qualitative analysis,while external standard method was used for quantitative analysis. For the headspace gas chromatographic method,correlation coefficient of regression curve was 0. 998 5,detection limit was 0. 009 7 mg / L,relative standard deviation was 2. 3% - 3. 0%and recovery rates were 104% - 106%. For the liquid-liquid extraction gas chromatographic method,correlation coefficient of regression curve was 0. 998 4,detection limit was 0. 03 mg / L,relative standard deviation was 3. 8% - 4. 3% and recovery rates were 92% - 94%. The results demonstrate that the headspace gas chromatographic method is better than the liquid-liquid extraction gas chromatographic method in correlation coefficient of regression curve,detection limit,relative standard deviation and recovery rates. The headspace gas chromatographic method is simple,fast,sensitive and accurate for the determination of turpentine in complicated water.
出处
《陕西理工学院学报（自然科学版）》
2016年第1期54-58,共5页
Journal of Shananxi University of Technology:Natural Science Edition
