Alkali - resistant : without opparent change in 10 % oxyhydrogen sodium solution at 72 hour 耐碱性:在10 %氢氧化钠水溶液中浸72小时无明显变化
4.
Petroleum products . liquefied petroleum gases . determination of total sulfur . determination with oxyhydrogen burner or lamp 石油产品.液化石油气.总硫量的测定.用氢氧燃烧器或灯测定
5.
To determine the vitriolic solute quality mark in sewage does following tests : take 10 grams this sewage , chase to the middle of sewage drop join solute quality mark to change sodium solution for the oxyhydrogen of 4 % , if plan institute is shown , the ph change of the quality of solution of natrium of oxidation of place drop hydrogenation and solution concerns 为测定污水中硫酸的溶质质量分数做如下实验：取10克该污水，向污水中逐滴加入溶质质量分数为4 %的氢氧化钠溶液，所滴加氢氧化钠溶液的质量与溶液的ph变化关系如图所示。
6.
Through the study of characteristic of macroelement , microelement , rare - earth element , oxyhydrogen isotope , sulfur isotope , lead isotope , fluid inclusion etc , a conclusion can be drawn that metallogenic substance comes from the upper mantle with mixing of some substance from the upper crust latter . it is likely to have the same source with the surrounding rock 通过对矿床的常量元素、微量元素、稀土元素、流体包裹体特征、氢氧同位素、硫同位素、铅同位素等特征的研究，认为成矿物质主要来源于上地幔，与周围岩石存在着同源的可能性，后期有一定的上地壳物质混入，成矿作用有三期，分别与区内的花岗岩、二长花岗岩脉、云煌岩脉有关。
