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当一气体被某一特殊液体(吸收剂)吸收时(如二氧化碳为氢氧化钾溶液所吸收),或某些液体与液体相互作用时(如硫酸与水作用),均会产生一定的反应热。其热量之多寡,为被吸收气体或反应液体浓度的函数,即:H=f(c) (1)因此,即可通过测量所发生的热流量来计算出被测物质的浓度。基于这种原理的一种定量测定法,称为测热分析法。利用这种方法可以进行氧、二氧化碳、二氧化硫、硫化氢、水蒸汽和硫酸等的测定。在测热分析中,首先要解决的是测热元件或热接受器问题,也就是如何将热的参量变为其他可测量的
When a gas is absorbed by a particular liquid (absorbent) (such as carbon dioxide is absorbed by the potassium hydroxide solution), or some liquids interact with the liquid (such as sulfuric acid and water), will have a certain reaction heat . The amount of heat, as a function of the concentration of gas being absorbed or of the reaction liquid, is: H = f (c) (1) Thus, the concentration of the test substance can be calculated by measuring the amount of heat flow that occurs. A quantitative assay based on this principle, known as calorimetry. Using this method can be oxygen, carbon dioxide, sulfur dioxide, hydrogen sulfide, water vapor and sulfuric acid determination. In the thermometry analysis, the first problem to be solved is the problem of the heat-measuring element or the heat receiver, that is, how to change the heat parameter into other measurable