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根据GB/T 21775-2008及ASTM D3941-90标准,研制了一台基于平衡杯的闪点测量实验装置,采用电火花放电的点火方式,通过热电偶测量温度判断闪火.新研制的闪点仪可测量闪点的温度范围为-30~300℃,实验测量结果的重复性与准确度均优于±0.5℃.通过对闪点测量标准中给出的3种标准物质及几种常见物质的测试,验证了闪点仪的准确性.对二甲基亚砜水溶液的闪点进行了实验研究,为二甲基亚砜水溶液的安全应用提供了重要的安全数据.
According to the GB / T 21775-2008 and ASTM D3941-90 standards, a measuring device based on the balance cup has been developed, which adopts the ignition mode of EDM to judge the flashover through the temperature measurement of the thermocouple. The newly developed flash point The instrument can measure the flash point temperature range -30 ~ 300 ℃, the repeatability and accuracy of the experimental measurement results are better than ± 0.5 ℃ .Three kinds of standard materials and several common substances The flash point of dimethyl sulfoxide aqueous solution was experimentally studied, which provided important safety data for the safe application of dimethyl sulfoxide aqueous solution.