EN ISO 12782-4:2012 土質(zhì).土壤和材料成分的浸出和物種形成的地球化學(xué)模型參數(shù).土壤樣品中腐殖物質(zhì)提取
Soil quality - Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials - Part 4: Extraction of humic substances from solid samples (ISO 12782-4:2012)