添加剂及润滑油中钡含量的测定方法,在国内石油产品试验方法中,有Sy2658—77S法(重量法),在国外有英国石油学会Ip110/74法(重量法)。它们测定的一个共同点是:要将样品燃烧,灰化后,用酸溶解、洗涤、沉淀、过滤、灼烧、称重,手续繁杂,八小时以上才有结果。本法与一般的络合法也不同,它的特点是:不必燃烧、灰化、溶解等,而是将定量样品在苯—乙醇混合液中,直接进行络合滴定,二十分钟左右即得结 Additives and lubricants in the determination of barium content, test methods in the domestic petroleum products, there Sy2658-77S method (gravimetric method), the British Petroleum Institute abroad Ip110 / 74 method (gravimetric method). One of their common determinations is: to burn the sample, after ashing, dissolving with acid, washing, sedimentation, filtration, burning, weighing, complex procedures, more than eight hours to have the result. This law and the general complex law is also different, it is characterized by: do not burn, ashing, dissolved, etc., but the quantitative sample in benzene - ethanol mixture, direct complexation titration, about 20 minutes Knot