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要进行钾和钠的混合盐的分别测定,是比较困难的。利用阳离子交换树脂进行分别测定,过去在文献上很少见到。G.Gabrielson用很普通的磺酸型阳离子交换树脂,分别测定钾和纳的含量。(一)基本方法和计算:取氯化钾和氯化钠溶液一定量,挥发,干燥,精密秤重。另取一分与上述等量的溶液,通过以钾盐(或钠盐)饱和后的离子交换树脂,收集流出液和洗液,挥发,干燥,精密秤重。设原溶液中含氯化钾a克,氯化钠b克,挥发干燥后称重为S_1,则: a+b=S_1………………………………(1) 另一分溶液通过以钾盐饱和的树脂后,a克氯化钾仍旧不变,而b克氯化钠转变为相对应的氯化钾,挥发干燥后称重为S_2,则:
To carry out the determination of mixed salts of potassium and sodium, respectively, is more difficult. The use of cation exchange resins for the separate measurements was rarely seen in the literature. G. Gabrielson uses very common sulfonic acid type cation exchange resins to determine the contents of potassium and sodium, respectively. (A) the basic methods and calculations: take a certain amount of potassium chloride and sodium chloride solution, volatile, dry, precision weighing. Another one point with the above solution, through the potassium salt (or sodium salt) after the saturation of the ion exchange resin, collecting effluent and washings, volatile, dried, precision weighing. Suppose the original solution containing a gram of potassium chloride, sodium chloride b grams, after evaporation of dry Weigh S_1, then: a + b = S_1 .................................... (1) Another After the solution was saturated with potassium salt resin, a gram of potassium chloride remains unchanged, and b grams of sodium chloride into the corresponding potassium chloride, evaporated and weighed as S_2: