ISO-15604 › Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
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ISO 15604:2016 specifies a method for the determination of any one form of nitrogen in the presence of any other form.
The method is applicable to any fertilizer provided for in the Regulation (EC) No 2003/2003, Annex I containing nitrogen in various forms.
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May 1, 2016