CEN/TS 17701-2:2022

SLOVENSKI STANDARD
01-februar-2023
Rastlinski biostimulanti - Določevanje specifičnih elementov - 2. del: Določevanje
celotnega Cd, Pb, Ni, As, Cr, Cu in Zn
Plant biostimulants - Determination of specific elements - Part 2: Determination of total
content of Cd, Pb, Ni, As, Cr, Cu and Zn
Pflanzen-Biostimulanzien - Bestimmung spezifischer Elemente - Teil 2: Bestimmung des
Gesamtgehaltes an Cd, Pb, Ni, As, Cr, Cu und Zn
Biostimulants des végétaux - Dosage des éléments spécifiques - Partie 2 :
Détermination de la teneur totale en Cd, Pb, Ni, As, Cr, Cu et Zn
Ta slovenski standard je istoveten z: CEN/TS 17701-2:2022
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 17701-2
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
March 2022
TECHNISCHE SPEZIFIKATION
ICS 65.080
English Version
Plant biostimulants - Determination of specific elements -
Part 2: Determination of total content of Cd, Pb, Ni, As, Cr,
Cu and Zn
Biostimulants des végétaux - Dosage des éléments Biostimulanzien für die pflanzliche Anwendung -
spécifiques - Partie 2 : Détermination de la teneur Bestimmung spezifischer Elemente - Teil 2:
totale en Cd, Pb, Ni, As, Cr, Cu et Zn Bestimmung des Gesamtgehaltes an Cd, Pb, Ni, As, Cr,
Cu und Zn
This Technical Specification (CEN/TS) was approved by CEN on 3 January 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 17701-2:2022 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 . 6
5 Interferences . 6
5.1 General . 6
5.2 Spectral interferences . 6
5.3 Transport interferences . 6
5.4 Excitation interferences . 6
5.5 Chemical interferences . 7
5.6 Memory interferences . 7
6 Reagents . 7
7 Apparatus . 8
7.1 Common laboratory glassware. . 8
7.2 Inductively coupled plasma atomic emission spectrometer. . 8
8 Procedure. 8
8.1 Preparation of test and blank solution . 8
8.2 Preparation of the calibration solutions . 8
8.3 Measurement . 9
8.3.1 Instrument conditions . 9
8.3.2 Optimization of the instrument conditions . 9
8.3.3 Interferences . 9
8.3.4 Measurement . 9
8.3.5 Matrix effects . 9
8.3.6 Spiking. 10
9 Calculation and expression of the results . 11
10 Test report . 12
Bibliography . 13

European foreword
This document (CEN/TS 17701-2:2022) has been prepared by Technical Committee CEN/TC 455 “Plant
Biostimulants”, the secretariat of which is held by AFNOR.
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.
The CEN/TS 17701 series, Plant biostimulants - Determination of specific elements, consists of the
following parts:
— Part 1: Digestion by aqua regia for subsequent determination of elements;
— Part 2: Determination of total content of Cd, Pb, Ni, As, Cr, Cu and Zn;
— Part 3: Determination of mercury.
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
This document was prepared by the experts of CEN/TC 455 “Plant Biostimulants”. The European
Committee for Standardization (CEN) was requested by the European Commission (EC) to draft
European standards or European standardization deliverables to support the implementation of
Regulation (EU) 2019/1009 of the European Parliament and of the Council of 5 June 2019 laying down
rules on the making available on the market of EU fertilising products (“FPR” or “Fertilising Products
Regulation”).
This standardization request, presented as M/564, also contributes to the Communication on “Innovating
for Sustainable Growth: A Bio economy for Europe”. Working Group 4 “Other safety parameters” was
created to develop a work program as part of this standardization request. Technical Committee CEN/TC
455 “Plant Biostimulants” was established to carry out the work program that will prepare a series of
standards. The interest in biostimulants has increased significantly in Europe as a valuable tool to use in
agriculture. Standardization was identified as having an important role in order to promote the use of
biostimulants. The work of CEN/TC 455 seeks to improve the reliability of the supply chain, thereby
improving the confidence of farmers, industry, and consumers in biostimulants, and will promote and
support commercialisation of the European biostimulant industry.
The preparation of this document is based on a standardization request to CEN by the European
Commission and the European Free Trade Association (Mandate M/564) concerning the modernization
of methods of analysis of fertilizers in the framework of Regulation (EU) 2019/1009 of the European
Parliament and of the Council.
This document is part of a modular approach and concerns the analytical measurement step. “Modular”
means that a test standard concerns a specific step in assessing a property and not the whole chain of
measurements. Inductively coupled plasma atomic emission spectrometry (ICP-AES) is nowadays widely
used and a well-established method in many laboratories.
WARNING — Persons using this document should be familiar with usual 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 method for the determination of arsenic (As), cadmium (Cd), copper (Cu),
chromium (Cr), lead (Pb), nickel (Ni) and zinc (Zn) in plant biostimulant digests using inductively coupled
plasma-atomic emission spectrometry (ICP-AES).
This document is also applicable to the blends of fertilizing products where plant biostimulants are the
main part of the blend. Otherwise, the Technical Specification for the main part of the blend applies.
This method is applicable to aqua regia digests prepared according to CEN/TS 17701-1. The method can
be used for the determination of other elements, provided the user has verified the applicability.
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.
CEN/TS 17701-1, Plant biostimulants - Determination of specific elements - Part 1: Digestion by aqua regia
for subsequent determination of elements
CEN/TS 17704, Plant biostimulants - Determination of dry matter
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
analyte
parameter to be determined
3.2
blank calibration solution
solution prepared in the same way as the calibration solution but leaving out the analytes
3.3
blank test solution
solution prepared in the same way as the test sample solution but omitting the test portion
3.4
calibration solution
solution used to calibrate the instrument, prepared from stock solutions by adding acids, buffer, reference
element and salts as needed
3.5
digest
solution received after mineralization of the organic matter of a sample and dissolution of its mineral
part, more or less completely, when reacting with a reagent mixture
3.6
stock solution
solution with accurately known analyte concentration(s), prepared from pure chemicals (6.5)
3.7
test sample solution
solution prepared after extraction or digestion of the test sample according to appropriate specifications
4 Principle
The method is based on the inductively coupled plasma atomic emission spectrometry (ICP-AES)
measurement of the concentration of arsenic, cadmium,
...