目前,多数分析方法难以计算工业氢氧化钙中氧化钙、氢氧化钙和碳酸钙的含量。将蔗糖滴定法和热重分析相结合,对工业氢氧化钙中的氧化钙、氢氧化钙和碳酸钙做了分析。采用GB/T 5762—2012《建材用石灰石、生石灰和熟石灰化学分析方法》测定氢氧化钙中有效钙的含量。根据氢氧化钙和碳酸钙分解温度的差异,使用热重分析测定工业氢氧化钙中氢氧化钙和碳酸钙的含量。之后,将有效钙中的氢氧化钙部分扣除并换算,得到氧化钙的含量。实验得到氧化钙、氢氧化钙和碳酸钙这3种物质的含量,其余部分为杂质。该方法具有操作相对简单、测定成分种类较多的优点。

At present,most analytical methods are difficult to calculate the content of calcium oxide,calcium hydroxide and calcium carbonate in industrial calcium hydroxide.The combination of sucrose titration and thermogravimetric analysis was carried out to analyze CaO,Ca（OH）₂ and CaCO₃ in industrial calcium hydroxide.The content of available calcium in calcium hydroxide was determined by GB/T 5762—2012,Methods for Chemical Analysis of Limestone,Quicklime and Hydrated Lime for Building Materials Industry.Due to the difference in decomposition temperatures of calcium hydroxide and calcium carbonate,the content of calcium hydroxide and calcium carbonate in industrial calcium hydroxide was determined by ther-mogravimetric analysis.When the calcium hydroxide in the available calcium was deducted and the remainder was converted,the content of calcium oxide could be obtained.Thus,the contents of three substances,i.e.CaO,Ca（OH）₂ and CaCO₃,were obtained.And the rest parts were other impurities.This method has many advantages,such as relatively simple operation and a large variety of measured components.