DIN EN 13368-1-2014 肥料.色谱法测定肥料中螯合剂含量.第1部分:离子色谱法测定乙二胺四乙酸(EDTA)、羟乙基乙烯二胺三醋酸(HEDTA)和二乙酰三胺五醋酸(DTPA).德文版本EN 13368-1-2014
Fertilizers - Determination of chelating agents in fertilizers by chromatography - Part 1: Determination of EDTA, HEEDTA and DTPA by ion chromatography; German version EN 13368-1:2014