论文部分内容阅读
除虫菊素在除虫菊花或制剂中的含量分析方法,有容量分析法,即A.O.A.C.法(汞还原法),比色法,极谱分析法,色层分析法,纸上层析法,光谱分析法等。其中以容量分析法比较准确,世界各国多采用它。但这方法操作步骤多、费时久,在应用上感觉不便,最初一步提取手续,以石油醚用索氏抽出器抽提除虫菊素时,就须迴流八小时,因此有改进的必要,我们用一种改进抽出装置,经过多次试验,只须45
Method for analysis of content of pyrethrins in chrysanthemum flowers or preparations. Volumetric analysis methods, namely AOAC method (mercury reduction method), colorimetric method, polarographic analysis method, chromatographic analysis method, paper chromatography method, spectral analysis method Wait. Among them, the volume analysis method is more accurate and many countries around the world use it. However, this method has many operating procedures and takes a long time. It is inconvenient to use. When the first step is to extract the pyrethrum from the Soxhlet extractor of petroleum ether, it must be returned for eight hours. Therefore, there is a need for improvement. Improved extraction device, after multiple tests, only 45