Method for testing saturated vapor pressure of oxadiazon technical material by using thermogravimetric analyzer

The invention discloses a method for testing the saturated vapor pressure of an oxadiazon raw drug by using a thermogravimetric analyzer, and relates to the technical field of pesticide physical and chemical property analysis, and the method comprises the following steps: firstly, measuring the weightlessness of benzoic acid at different temperatures, and calculating the evaporation rate of benzoic acid at each measurement temperature by using a benzoic acid evaporation rate formula; the relation between saturated vapor pressure and temperature is searched from Kruif and Blok data, the saturated vapor pressure of benzoic acid at each measurement temperature is calculated, the evaporation rate and saturated vapor pressure fitting curve is utilized, the weightlessness of oxadiazon at different temperatures is measured, and the evaporation rate of oxadiazon at each measurement temperature is calculated by utilizing an oxadiazon evaporation rate calculation formula. And calculating the saturated vapor pressure of