一、概述关于石油、化工工艺流程及实验室中ppm级的微量水的测定,据我们所知,用卡尔菲体法比较可靠,使用也较广,但是它有其不可克服的缺点:(1)不能连续测定;(2)很多物质对测量有干扰,特别是强氧化剂和还原剂对测量干扰很大。重量法(用P_2O_5吸收后称重量)是较古老的方法,它的主要缺点是不能连续测定,测量时间较长。露点法在国内使用的单位很多,但目前所使用的这些露点仪多数是非自动式的,其缺点是:(1)不能连续测定;(2)测定100ppm以下浓度时困难较大,因为有些有机化合物的露 First, an overview About oil, chemical processes and laboratories in the ppm level of trace water determination, to our knowledge, the Californian body method is more reliable, the use is wider, but it has its insurmountable shortcomings: (1 ) Can not be continuously measured; (2) many substances interfere with the measurement, especially strong oxidants and reducing agents interfere with the measurement. The gravimetric method (weighing after absorption with P 2 O 5) is an older method whose main drawback is the inability to measure continuously and the measurement time to be longer. Dew point method used in the country a lot, but most of the dew point meter used today is non-automatic, the disadvantages are: (1) can not be measured continuously; (2) determination of 100ppm concentration is more difficult, because some organic compounds The dew