CEN/TS 17788:2022

SLOVENSKI STANDARD
01-februar-2023
Organsko-mineralna gnojila - Določanje deleža kompleksiranih mikrohranil
Organo-mineral fertilizers - Determination of the fraction of complexed micronutrients
Organisch-mineralische Düngemittel - Bestimmung des Anteils an komplexierten
Spurennährstoffen
Engrais organo-minéraux - Détermination de la fraction d'oligo-éléments complexés
Ta slovenski standard je istoveten z: CEN/TS 17788:2022
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 17788
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
April 2022
TECHNISCHE SPEZIFIKATION
ICS 65.080
English Version
Organo-mineral fertilizers - Determination of the fraction
of complexed micronutrients
Engrais organo-minéraux - Détermination de la Organisch-mineralische Düngemittel - Bestimmung des
fraction d'oligo-éléments complexés Anteils an komplexierten Spurennährstoffen
This Technical Specification (CEN/TS) was approved by CEN on 21 February 2022 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17788:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 5
5 Interferences . 6
6 Reagents . 6
7 Apparatus . 6
8 Sampling and sample preparation . 7
9 Procedure . 7
9.1 Preparation of the sample solution . 7
9.2 Precipitation . 7
9.3 Spectrometric determination . 8
9.4 Water-soluble micronutrient content determination . 8
10 Expression of results . 8
10.1 Complexed micronutrient content in the fertilizer . 8
10.2 Complexed fraction of a micronutrient in the fertilizer . 8
11 Test report . 9
Bibliography . 10

European foreword
This document (CEN/TS 17788:2022) has been prepared by Technical Committee CEN/TC 260
“Fertilizers and liming materials”, the secretariat of which is held by DIN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
Introduction
Micronutrients are considered to be, in plant nutrition, a number of elements known to be needed in
small amounts for proper plant growth and development. The most common are Iron (Fe), Manganese
(Mn), Molybdenum (Mo), Copper (Cu), Zinc (Zn) and Boron (B).
If an organo-mineral fertilizer contains a substance, or one of the substances in the mixture, which is
intended to enhance the long-term availability to plants of micronutrients in the EU fertilizing product,
that substance can be either a chelating agent or a complexing agent.
The incorporation of complexing agents in organo-mineral fertilizers is intended to enhance the long-
term availability to plants of micronutrients in such EU fertilizing products.
WARNING – Users of this document should be familiar with normal laboratory practice. This document
does not purport to address all of the safety issues, if any, associated with its use. It is the responsibility
of the user to establish appropriate health and safety practices and to ensure compliance with any
national regulatory conditions.
IMPORTANT – It is absolutely essential that tests conducted according to this document are carried out
by suitably trained staff.
1 Scope
This document specifies a general method for the determination of the micronutrients complexed by
complexing agents in organo-mineral fertilizers. The method allows the determination of the total
concentration of each complexed micronutrient in complexes after subtraction of the chelated micro-
nutrients content, but it does not identify the individual complexing agents.
This procedure concerns EU organo-mineral fertilizing products which contain complexed micro-
nutrients covered by Regulation (EU) 2019/1009 [6]. The method is applicable to a mass fraction of the
metal complexed of at least 0,07 %, 0,006 % and 0,035 % of Fe, Mn and Zn respectively (see [7]). A lower
limit of quantification has not been established for Cu and Co.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12944-1, Fertilizers and liming materials — Vocabulary — Part 1: General terms
EN 12944-2, Fertilizers and liming materials — Vocabulary — Part 2: Terms relating to fertilizers
EN 16962, Fertilizers — Extraction of water soluble micro
...