论文部分内容阅读
通过考察空气湿度、进样量、卡尔费休试剂消耗体积、漂移值、分析时间几个因素之间的关系,明确了空气湿度是影响卡尔费休法准确定量化工产品水分的主要原因之一。空气湿度主要改变仪器漂移值,而与样品分析时间无显著关系,当空气相对湿度低于40%时,仪器漂移值基本稳定在10以下,分析时间主要由注入滴定池中样品总水分含量决定。为保证测量数据准确,要保证滴定前漂移值尽可能低且稳定,同时注入滴定池样品总水分含量要在仪器要求的最佳测量范围内。
By examining the relationship between air humidity, injection volume, consumption volume of Karl Fischer reagent, drift value, and analysis time, it is clear that air humidity is one of the main factors that affect Karl Fischer’s method to accurately quantify the moisture content of chemical products. The air humidity mainly changes the instrument drift value but has no significant relation with the sample analysis time. When the air relative humidity is less than 40%, the instrument drift value is basically stable below 10, and the analysis time is mainly determined by the total moisture content injected into the titration cell. In order to ensure accurate measurement data, to ensure that the drifting drift before the titration as low as possible and stable, while injecting titration sample total moisture content in the instrument to the best measurement range.