DIN EN ISO 20079:2006-12
水质-水成分和废水对浮萍(Lemnaminor)毒性作用的测定-浮萍生长抑制试验
Water quality - Determination of the toxic effect of water constituents and waste water on duckweed (Lemna minor) - Duckweed growth inhibition test (ISO 20079:2005); German version EN ISO 20079:2006