ISO 15959:2016 PDF

Scope: This International Standard specifies a method for the determination of phosphorus in fertilizer extracts. The method is applicable to all extracts of fertilizers for the determination of the different forms of phosphorus as phosphorus soluble in mineral acids, water soluble phosphorus, phosphorus soluble in solutions of ammonium citrate, phosphorus soluble in 2 % citric acid and phosphorus soluble in 2 % formic acid.

ISO 15959:2016 Referenced Document

EN 12944-1:1999 Fertilizers and Liming Materials - Vocabulary - Part 1: General Terms
EN 12944-2:1999 Fertilizers and Liming Materials - Vocabulary - Part 2: Terms Relating to Fertilizers
EN 15919:2011 Fertilizers - Extraction of phosphorus soluble in 2 % formic acid
EN 15920:2011 Fertilizers - Extraction of phosphorus soluble in 2 % citric acid
EN 15921:2011 Fertilizers - Extraction of soluble phosphorus according to Petermann at 65 °C
EN 15922:2011 Fertilizers - Extraction of soluble phosphorus according to Petermann at ambient temperature
EN 15923:2011 Fertilizers - Extraction of phosphorus soluble in Joulie's alcaline ammonium citrate
EN 15956:2011 Fertilizers - Extraction of phosphorus soluble in mineral acids
EN 15957:2011 Fertilizers - Extraction of phosphorus which is soluble in neutral ammonium citrate
EN 15958:2011 Fertilizers - Extraction of water soluble phosphorus*， 2024-04-20 Update
ISO 14820-1:2016 Fertilizers and liming materials - Sampling and sample preparation - Part 1: Sampling
ISO 14820-2:2016 Fertilizers and liming materials - Sampling and sample preparation - Part 2: Sample preparation
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method