SHENZHEN CHONDEKUAI TECHNOLOGY CO.LTD , https://www.szsiheyi.comDL / T 919-2005 predetermined, the mineral oil content of SF 6 gas is measured by infrared spectroscopy, the measurement principle is: the amount of the SF 6 gas at a certain flow rate through the two washing with a volume of ccl 4 trachea, so that mineral oil dispersion in SF 6 gas is completely absorbed, and then measuring the absorbance at 2930cm -1 absorption peak of the absorption liquid (corresponding paraffins asymmetric stretching vibration of methylene group), and then isolated from the absorption curve concentration in the mineral oil, the content is calculated. A predetermined standard using an infrared spectrophotometer, oil meter may also be employed.