卡尔费休法测定标准水及无水乙醇水分含量的改进研究

Study on the Improvement of Karl Fischer Method for Determining the Water Content of Standard Water and Absolute Ethanol

本研究改进了卡尔费休法,然后将其用于标准水的测定。其间用差重法计量,一次吸入标样后分次注射,多次重复测量,结果准确度高,与标准值相吻合,重现性好。研究表明,此方法推广至无水乙醇水分含量检测,结果更加准确可靠。

This study improved the Karl Fischer method,and then used it for the determination of standard water.In the meantime,the weight difference method was used for measurement,and the standard sample was inhaled once and then injected in several times,and the measurement was repeated many times.The result is high in accuracy,consistent with the standard value and good reproducibility.Studies have shown that this method is extended to the detection of the moisture content of absolute ethanol,and the results are more accurate and reliable.