标准摘要
[中文适用范围]： 还包括测定总酸度、六氟硅酸含量和不挥发酸含量的滴定法以及计算氟氢含量的方法。 规定了这些方法的范围和应用领域，并声明了程序的原理。 第二版是在第一版中纳入附录的结果。 取消并取代第一版 ISO 3139/1974。 [外文原描述]： Contains also titrimetric methods for determination of the total acidity, the hexafluorosilicic acid content and the non-volatile acids content and a method for calculating the hydrogen fluoric content. Specifies the scope and the field of application of these methods and declares the principle of the procedures. This second edition results from the incorporation of Addendum in the first one. Cancels and replaces the first edition ISO 3139/1974.
英文名称Aqueous hydrofluoric acid for industrial use — Sampling and methods of test