土壤易溶盐浸提液中硫酸根和硝酸根的测定

Determination of Sulfate and Nitrate Dissolvable Salts in Soil Samples

摘要: 对不同地区不同深度的土壤进行前期预处理，在最佳试验条件下，应用离子色谱法测定土壤浸提液中硫酸根和硝酸根的含量，测定的相对标准偏差分别为1.9%和3.0%，加标回收率SO₄^2- 90.0%~100.0%、NO₃^- 93.0%~101.0%.样品预处理操作简单，方法灵敏度和准确性高，结果稳定性好，检出限低，能满足土壤环境样品检验的要求.

Abstract: Soils from different places and depths were dissolved in water, and under the optimal conditions, the contents of sulfate and nitrate were determined by ion chromatography. The results showed that:the relative standard deviations were 1.9% and 3.0%, the recoveries of sulfate and nitrate were 90.0%~100.0% and 93.0%~101.0%, respectively. The method is simple and rapid.The precision and accuracy are in accordance with the requirement of sulfate and nitrate determination for soil test.