顶空-气相色谱法测定植物提取物中19种有机溶剂的残留量

Head-Space GC Determination of Residual Amounts of 19 Organic Solvents in Plant Extracts

提出了顶空一气相色谱法测定植物提取物中19种有机溶剂残留量的方法。选择顶空平衡温度和时间分别为80℃和30min，用DB-FFAP色谱柱分离，火焰离子化检测器检测。19种有机溶剂在一定的质量浓度范围内与其峰面积呈线性关系，方法的检出限（3S／N）在0．005～0．2mg·L-1之间。在3个浓度水平上做回收试验，加标回收率在92．3％～115％之间，相对标准偏差（n=6）均小于8％。

Head-space wa applu , extracts. The balanced temperature and time of head space were set out at 80 C and 30 rain. The analytes were separated on DB-FFAP column and detected by FID. Linear relationships between values of peak area and mass concentration of 19 organic solvents were kept in definite ranges. Detection limit （3S/N） found were ranged from 0. 005 to 0. 2 rag L-1. Tests for recovery were performed by addition of mixed standard of 19 organic solvents at 3 concentration levels for 6 parallel determinations, results of recovery found were in the range of 02. 3--115 with RSDs in the range less than 8.