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90.93 Standard confirmed Jun 20, 2023
CEN
CEN/TC 260 Fertilizers and liming materials
European Norm
65.080 Fertilizers
Published
This document specifies two complementary methods (method A and method B) that allow lignosulfonates to be indentified as soluble complexing agents in fertilizers.
NOTE Lignosulfonate, 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].
Legislation related to this standard
Regulation (EC) N° 2003/2003 of the European Parlament and of the council of 13 October 2003 relating to fertilisers
PUBLISHED
EN 16109:2011
90.93
Standard confirmed
Jun 20, 2023