硫酸和盐酸滴定土壤中碳酸根和重碳酸根的测定结果探讨

Discussion on the Determination Results of Carbonate and Bicarbonate in Soil Titrated with Sulfuric Acid and Hydrochloric Acid

LY/T 1251—1999《森林土壤水溶性盐分分析》第4部分碳酸根和重碳酸根的测定,只有硫酸标准溶液滴定法。本文通过对土壤样品分别采用硫酸和盐酸标准溶液进行测定,其结果表明:硫酸标准溶液测定土样的碳酸根和重碳酸根含量分别为0.00369 moL/kg和0.00804 moL/kg;盐酸标准溶液测定土样的碳酸根和重碳酸根含量分别为0.00364 moL/kg和0.00810 moL/kg。测试表明,用硫酸和盐酸标准溶液滴定碳酸根和重碳酸根时,其结果均在最大允许偏差范围内。

LY/T 1251-1999 analysis of water-soluble salts in forest soil,Part 4 Determination of carbonate and bicarbonate,only sulfuric acid standard solution titration method.The results show that the contents of carbonate and bicarbonate in soil samples measured by sulfuric acid standard solution are 0.369 moL/kg and 0.804 moL/kg respectively.The contents of carbonate and bicarbonate in soil samples determined by hydrochloric acid standard solution are 0.364 moL/kg and 0.810 moL/kg respectively.The test shows that when titrating carbonate and bicarbonate with sulfuric acid and hydrochloric acid standard solution,the results are within the maximum allowable deviation range.