Determination of Sulfate and Nitrate Dissolvable Salts in Soil Samples

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.