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添加剂及石油产品中钙含量的测定方法,在国内石油产品试验方法中,一个是SY2678—77S 法(络合法),一个是SY2659-65法(容量法)。它们测定的一个共同点是:要将样品燃烧,灰化后用酸溶解、中和等,于续繁杂,在水溶液中进行滴定四小时左右才有结果。本法的特点是:不必加热、灰化、溶解、中和,而是将定量样品在苯-乙醇混合溶液中,直接进行络合滴定,二十分钟左右即得结果,但不排除部分重金属离子的干扰。
Additives and petroleum products in the determination of calcium content in the domestic petroleum products test methods, one is SY2678-77S method (complex method), one is the SY2659-65 method (volume method). One of their common determinations is that the sample should be burned, acidified with ascorbic acid, neutralized, and so on, for a period of four hours or so after titration in aqueous solution. The law is characterized by: without heating, ashing, dissolving, neutralization, but the quantitative sample in benzene - ethanol mixed solution, direct complexation titration, about 20 minutes to get the result, but does not rule out some of the heavy metal ions Interference.