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对用Ca~(2+)离子选择电极指示络合滴定终点来测定糖液中的Ca~(2+)离子含量进行了试验,结果表明,用Ca~(2+)离子选择电极指示络合滴定终点的方法与常用的络合滴定法相比,测定结果没有明显差异,相对标准偏差小于0.6%。认为:用该方法测定糖品中Ca~(2+)离子含量是可行的;如用自身电位滴定,并把较复杂的计算用计算机处理,则更加准确、简便和快速。
The Ca 2+ ion content in the sugar solution was measured by using the Ca 2+ ion selective electrode to indicate the end point of the complexometric titration. The results showed that the Ca 2+ ion selective electrode was used to indicate the complexation Compared with the commonly used complexometric titration method, there is no significant difference between the titration end point and the relative standard deviation of less than 0.6%. It is considered that it is feasible to determine the content of Ca2 + in sugar by this method. It is more accurate, simple and rapid to measure the content of Ca2 + in sugar by means of potentiometric titration and computerized processing of more complicated calculation.