标准摘要
[中文适用范围]： 本标准规定了用冰醋酸中高氯酸电位滴定法测定石油产品中基本成分的方法。 可以被认为具有碱性特征的成分包括有机和无机碱、氨基化合物、弱酸盐（例如肥皂）、多元酸碱的碱性盐和重金属盐。 已确定该方法精确值的基数值范围为： ——未使用过的油：基数值为 3 至 45； ——添加剂浓缩物：基数从 5 到 45； ——用过的油：基数从 3 到 30。 [外文原描述]： ISO 3771:2011 specifies a method for the determination of basic constituents in petroleum products by potentiometric titration with perchloric acid in glacial acetic acid. The constituents that can be considered to have basic characteristics include organic and inorganic bases, amino compounds, salts of weak acids (e.g. soaps), basic salts of polyacid bases, and salts of heavy metals. The ranges of base number values for which precision values for the method have been established are: unused oils: base numbers from 3 to 45; additive concentrates: base numbers from 5 to 45; used oils: base numbers from 3 to 30.
英文名称Petroleum products — Determination of base number — Perchloric acid potentiometric titration method