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UNE-EN 15476
Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
Edition
2009-05-27
UNE-EN 15558
Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
Edition
2009-10-28
UNE-EN 15750
Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
Edition
2010-07-07
UNE-CEN/TS 17771
Organic and organo-mineral fertilizers - Determination of the nitrogen content (Endorsed by Asociación Española de Normalización in May of 2022.)
Edition
2022-05-01
NF U42-148 ; NF EN 15562:2023-08-23
Inorganic fertilizers - Determination of cyanamide nitrogen
Edition
2023-08-23
XP U42-730 ; XP CEN/TS 17771:2022-05-18
Organic and organo-mineral fertilizers - Determination of the nitrogen content
Edition
2022-05-18
ASTM E 1787
Standard Test Method for Anions in Caustic Soda and Caustic Potash (Sodium Hydroxide and Potassium Hydroxide) by Ion Chromatography
Edition
2016
UNE-EN 15562
Inorganic fertilizers - Determination of cyanamide nitrogen
Edition
2024-03-20
ASTM C 1474
Standard Test Method for Analysis of Isotopic Composition of Uranium in Nuclear-Grade Fuel Material by Quadrupole Inductively Coupled Plasma-Mass Spectrometry
Edition
2019
UNE-EN 16913
Ambient air - Standard method for measurement of NO₃⁻, SO₄²⁻, Cl⁻, NH₄⁺, Na⁺, K⁺, Mg²⁺, Ca²⁺ in PM2,5 as deposited on filters
Edition
2018-02-28