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电石渣是电石水解获得乙炔气后产生的废渣,过量电石渣溶于水后所得的滤液成分为强碱性的氢氧化钙饱和溶液,实验过程中对电石渣进行了抽滤处理,再分别用盐酸法和EDTA法对电石渣溶液的浓度进行了测定.EDTA法测定过程中加入了三乙醇胺掩蔽溶液中的Fe3+、Al3+等杂质离子.通过实验结果对各测定方法进行了比较分析.“,”Carbide slag is the byproduct of acetylene gas by hydrolyzing the calcium carbide, the excessive amount of which will become the strongly basic saturated Ca(OH)2 solution when dissolved in water. In the experiment, the carbide slag is leached, and then the Hydrochloric Acid method and Ethylene Diamine Tetraacetic Acid (EDTA) method are used to determine the concentration of the solution. In the determination process with EDTA method, such foreign ions as Fe3+and Al3+ in the masking triethanolamine solution are added. Finally, the determination methods are compared and analyzed through the experimental results.