| 摘要 |
Disclosed is a method for quantitatively analyzing the amount of a fluorinated ether by-product contained in a crude fluoromethyl-1,1,1,3,3,3-hexafluoro-isopropyl ether, said method comprising the step of: subjecting said crude fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether to gas chromatography using a cross-linked cyanopropylmethylphenyl-silicone capillary column, whereby said fluorinated ether by-product is simultaneously isolated and quantitatively analyzed. With this, it becomes possible to make the content of hydrogen fluoride contained in the sample to an extent that the column is not virtually affected thereby. By the establishment of such an analytical method, the content of impurities in the production process of SEVOFLURANE can be extremely easily monitored. As a result of this, there is provided a remarkable advantage that SEVOFLURANE stable in quality can be obtained. |
