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DIN CEN/TS 17768Organic and organo-mineral fertilizers - Digestion by aqua regia for subsequent determination of elements; German version CEN/TS 17768:2022standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2022
DIN CEN/TS 17767Organo-mineral fertilizers - Extraction of phosphorus by formic acid; German version CEN/TS 17767:2022standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2022
DIN CEN/TS 17766Organic and organo-mineral fertilizers - Extraction by water for subsequent determination of elements; German version CEN/TS 17766:2022standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2022
DIN CEN/TS 17765Organic and organo-mineral fertilizers - Determination of the biuret content by high-performance liquid chromatography (HPLC); German version CEN/TS 17765:2022standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2022
DIN CEN/TS 17761Inorganic fertilizers - Determination of the chloride content in ammonium nitrate fertilizers of high nitrogen content; German version CEN/TS 17761:2022standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2022