《机械工人》热加工1986年第9期上刊登的“CO_2气体纯度的简易测量”一文中所介绍的检测方法,对确保焊接质量是十分必要的。但在测试中除文章所介绍的三个步骤外,还应注意下列几点。1.根据要求不是用氢氧化钠(NaOH)溶液,而应采用氢氧化钾(KOH)溶液(见GB 2306-80)。分析纯度的浓度为30％,不是文章中介绍 The detection method described in “Simple Measurement of CO 2 Gas Purity” published in the “Mechanical Workers” Thermal Processing, Issue 9, 1986 is necessary to ensure welding quality. But in the test in addition to the three steps described in the article, but also pay attention to the following points. 1. Instead of using a solution of sodium hydroxide (NaOH), a solution of potassium hydroxide (KOH) should be used (see GB 2306-80). Analytical purity concentration of 30%, not described in the article