【摘要】 对原料进行预处理后 ,用络合滴定法测定 Ca2 + 、Mg2 + 的含量 ,用 Ba SO4 重量法测 SO2 - 4,用过滤后的滤渣测定 Si O2 的质量 ,从而换算出滑石粉、石膏、碳酸钙的含量。该法测定准确、快速、精密度高更多还原

【Abstract】 Wheat flour or and its products were processed to change into solution.The contents of Ca 2+ and Mg 2+ were determined by complex metric titration,while SO 2- 4 was determined by gravimetric analysis of filter cake.Thus,the contents of talcum powder,gypsum and calcium carbonate can be calculated.更多还原