GB/T 8926-2012 in English

本标准规定了测定在用的润滑油中正戊烷不溶物和甲苯不溶物的两种方法。
本标准方法A适用于在用润滑油不加凝聚剂的正戊烷不溶物和甲苯不溶物的测定。本方法采用离心法将油—溶剂混合物中不溶物分离开。
本标准方法B适用于含有清净分散剂的在用润滑油,测定加入凝聚剂的凝聚后正戊烷不溶物和凝聚后甲苯不溶物。除方法A分离的物质外,本方法还可分离一些细小的可能悬浮在油中的物质。

Scope

This standard deals with certain hazardous materials, operations and equipment, but it is not intended to make recommendations on all safety issues related to this. Therefore, users should establish appropriate safety and protective measures and determine the applicability of relevant regulatory limitations before applying this standard. This standard specifies two methods for the determination of n-pentane insolubles and toluene insolubles in lubricating oils in use. Method A of this standard is applicable to the determination of n-pentane insolubles and toluene insolubles in lubricating oil without coagulant. This method uses centrifugation to separate the insoluble matter in the oil-solvent mixture. Method B of this standard is applicable to in-service lubricating oils containing detergent and dispersants, to determine the n-pentane insolubles after coagulation and toluene insolubles after coagulation with coagulation added. In addition to the substances separated by method A, this method can also separate some fine substances that may be suspended in the oil.