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CEN
EN 16109:2011

EN 16109:2011

Current

Current

The latest, up-to-date edition.

Fertilizers - Determination of complexed micro-nutrient ions in fertilizers - Identification of lignosulfonates

Published date

09-11-2011

Publisher

Comite Europeen de Normalisation

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Sampling and sample preparation
5 Method A: Determination of phenolic hydroxyl content
  and 232,5 nm absorption for the identification of
  lignosulfonates
6 Method B: Determination of organic sulfur content
  for the identification of lignosulfonates
7 Expression of the results
8 Precision
9 Test report
Annex A (informative) - Statistical results of the
       inter-laboratory test
Bibliography

This document specifies two complementary methods (method A and method B) that allow lignosulfonates to be indentified as soluble complexing agents in fertilizers.NOTELignosulfonate, as a complexing agent, is a natural polymer produced as a by-product of the sulfite method for manufacturing paper from wood pulp in the paper industry. As a natural polymer, it presents a poorly defined and variable chemical structure. It is an intricate mixture of small- to moderate-sized polymeric compounds with sulfonate groups attached to the molecule, and diverse complexing capacity. The methods are applicable to EC fertilizers covered by Regulation (EC) No 2003/2003 [1].

Committee
CEN/TC 260
DevelopmentNote
Supersedes PREN 16109. (11/2011)
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Current

Standards Relationship
BS EN 16109:2011 Identical
NBN EN 16109 : 2012 Identical
I.S. EN 16109:2011 Identical
UNI EN 16109 : 2012 Identical
SN EN 16109:2012 Identical
NF EN 16109 : 2011 Identical
NS EN 16109 : 2011 Identical
PN EN 16109 : 2011 Identical
NEN EN 16109 : 2011 Identical
UNE-EN 16109:2012 Identical
DIN EN 16109:2012-01 Identical

BS ISO 18645:2016 Fertilizers and soil conditioners. Water soluble fertilizer. General requirements
ISO 18645:2016 Fertilizers and soil conditioners Water soluble fertilizer General requirements

EN 12944-2:1999/AC:2000 FERTILIZERS AND LIMING MATERIALS AND SOIL IMPROVERS - VOCABULARY - PART 2: TERMS RELATING TO FERTILIZERS
EN 12944-1:1999/AC:2000 FERTILIZERS AND LIMING MATERIALS AND SOIL IMPROVERS - VOCABULARY - PART 1: GENERAL TERMS
EN 1482-2:2007 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
ISO 3696:1987 Water for analytical laboratory use — Specification and test methods
EN ISO 3696:1995 Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)
EN 1482-1:2007 Fertilizers and liming materials - Sampling and sample preparation - Part 1: Sampling

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