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Chinese Standard: GB/T 18609-2011

Determination of acid number of crude oil by potentiometric titration

MOD  ASTM D 664-2007

全国石油天然气标准化技术委员会(SAC/TC 355)

1.1 本标准规定了采用电位滴定法测定原油酸值的方法。
1.2 本标准适用于测定能够溶解于甲苯和异丙醇混合溶剂中的原油中的酸性组分。这些酸性组分在水中的离解常数要大于10-9;离解常数小于10-9的极弱酸不产生干扰。水解常数大于10-9的盐类将会参与反应。酸值的测定范围为0.1 mg/g~150 mg/g。

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