SH/T 0398-2007 in English

本标准规定了用蒸汽压渗透法测定石油蜡和石油脂分子量的方法。
本标准适用于石蜡、微晶蜡、液体石蜡、白色油、凡士林及能被邻被二氯苯、甲苯溶剂溶解的特种蜡，不适用于容易缔合或解离的物质。
本标准包含标准曲线法和仪器常数法，其中标准曲线法只适用于分子量＜800的样品，仪器常数法适用于全部测量范围。
本标准未对与使用有关的所有安全问题都提出建议，因此，在使用本标准之前，使用者应建立适当的安全和防护措施，并制定相应的管理制度。

Scope

1.1 This standard specifies the method for determining the molecular weight of petroleum waxes and petroleum greases using the vapor pressure osmosis method (VPO method for short). 1.2 This standard applies to paraffin, microcrystalline wax, liquid paraffin, white oil, petroleum jelly and special wax that can be dissolved by o-dichlorobenzene and toluene solvents. It does not apply to substances that are easy to associate or dissociate. 1.3 This standard includes the standard curve method and the instrument constant method. The standard curve method is only applicable to samples with molecular weight <800, and the instrument constant method is applicable to the entire measurement range. 1.4 This standard does not make recommendations on all safety issues related to use. Therefore, before using this standard, users should establish appropriate safety and protective measures and develop corresponding management systems.