NF X31-423-2-2007
土壤质量.氯化钾溶液萃取法测定田间持水土壤中的硝酸盐、亚硝酸盐和铵含量.第2部分:自动分段式流量分析法
Soil quality - Determination of nitrate, nitrite and ammonium in field-moist soils by extraction with potassium chloride solution - Part 2 : automated method with segmented flow analysis.