DIN EN ISO 12782-5:2012 土质. 土壤和材料成分的浸出和物种形成的地球化学模型参数. 第5部分:从含水样品中提取腐殖质 (ISO 12782-5-2012); 德文版本EN ISO 12782-5-2012
Soil quality - Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials - Part 5: Extraction of humic substances from aqueous samples (ISO 12782-5:2012); German version EN ISO 12782-5:2012