CEN/TS 17774:2022

SLOVENSKI STANDARD
01-februar-2023
Organska in organsko-mineralna gnojila - Določanje vsebnosti specifičnih
elementov z atomsko emisijsko spektrometrijo z induktivno sklopljeno plazmo
(ICP-AES) po ekstrakciji z vodo
Organic and organo-mineral fertilizers - Determination of the content of specific elements
by ICP-AES after extraction by water
Organische und organisch-mineralische Düngemittel - Bestimmung des Gehalts
spezifischer Elemente mittels ICP-AES nach Extraktion mit Wasser
Engrais organiques et organo-minéraux - Détermination de la teneur en éléments
spécifiques par ICP-AES après extraction à l'eau
Ta slovenski standard je istoveten z: CEN/TS 17774:2022
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 17774
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
April 2022
TECHNISCHE SPEZIFIKATION
ICS 65.080
English Version
Organic and organo-mineral fertilizers - Determination of
the content of specific elements by ICP-AES after
extraction by water
Engrais organiques et organo-minéraux - Organische und organisch-mineralische Düngemittel -
Détermination de la teneur en éléments spécifiques par Bestimmung des Gehalts spezifischer Elemente mittels
ICP-AES après extraction à l'eau ICP-AES nach Extraktion mit Wasser
This Technical Specification (CEN/TS) was approved by CEN on 13 March 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 17774:2022 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
5.1 General . 6
5.2 Spectral interferences . 6
5.3 Transport interferences . 6
5.4 Excitation interferences . 6
5.5 Chemical interferences . 6
5.6 Memory interferences . 6
6 Reagents . 7
7 Apparatus . 7
8 Procedure. 8
8.1 Preparation of test and blank solution . 8
8.2 Preparation of the calibration solutions . 8
8.3 Measurement . 8
9 Calculation and expression of the results . 11
10 Test report . 11
Bibliography . 12

European foreword
This document (CEN/TS 17774:2022) 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
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.
1 Scope
This document specifies a method for the determination of boron (B), cobalt (Co), copper (Cu), iron (Fe),
manganese (Mn), molybdenum (Mo) and zinc (Zn) in organic fertilizers and organo-mineral fertilizers
extracts using inductively coupled plasma-atomic emission spectrometry (ICP-AES).
NOTE Alternatively, inductively coupled plasma mass spectrometry (ICP-MS) can be used for the measurement
if the user proves that the method gives the same results.
This method is applicable to water extracts prepared according to CEN/TS 17766. 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 17766, Organic and organo-mineral fertilizers — Extraction by water for subsequent
determination of elements
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 ISO 3696:1995, Water for analytical laboratory use — Specification and test methods (ISO 3696:1987)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12944-1 and EN 12944-2 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
4 Principle
The method is based on the ICP-AES measurement of the concentration of boron (B), cobalt (Co), copper
(Cu), iron (Fe), manganese (Mn), molybdenum (Mo) and zinc (Zn) in fertilizer extracts prepared
according to CEN/TS 17766. The elements are determined after appropriate dilution of the extract. The
solution is dispersed by a nebulizer of the ICP-AES instrument and the resulting aerosol is transported
into the plasma. Element specific emission spectra are produced by a radio-frequency inductively coupled
argon plasma where atoms or ions are excited at high temperature. The emission spectra are dispersed
by a spectrometer, and the intensities of the emission lines are monitored by photosensitive devices.
Multi-element determinations using sequential or simultaneous optical systems and axial or radial
viewing of the plasma may be used.
The method may be used for the determination of other elements, provided the user has verified the
applicability.
5 Interferences
5.1 General
Interferences and matrix effects shall be recognized and appropriate measures to minimize them shall be
made. There are several types of interferences – see 5.2 to 5.6.
5.2 Spectral interferences
Spectral interferences are due to incomplete isolation of the radiation emitted by the analyte from other
detected radiation sources. Spectral interferences are caused by background emission from continuous
or recombination phenomena, by stray light which causes background increase or overlap of a spectral
line from another element, or unresolved overlap of molecular band spectra. Background emission and
stray light can usually be compensated for by subtracting the background emission measured adjacent to
the analyte wavelength peak. To correct a sloping background shift two background correction points on
each side of the peak are used. Increase of background is more intensive with axial-view instruments.
Background correction is not required in cases of line broadening where a background correction
measurement would actually degrade the analytical result. A spectral line overlap usually leads to the
choice of an alternative line. If this is not possible, mathematical correction procedures (e.g. inter-element
correction technique, multi-component spectral fitting) can be used to compensate for the interference.
These correction procedures are usually a part of the instrument software.
5.3 Transport interferences
Transport interferences are caused by differences in the properties between the sample solutions and
the calibration solutions (viscosity, surface tension, density, dissolved solid content, type and
concentration of acids). As a consequence, the supply of solution to the nebuliser, the efficiency of
nebulisation and the droplet size distribution of the aerosol is altered, resulting in a change of sensitivity.
Errors due to these interferences can be overcome by dilution of the solutions, by matrix matching, by
standard addition or by internal standard.
5.4 Excitation interferences
Excitation interferences are attributed to a change in the excitation conditions in the plasma, especially
by the presence of easily ionisable elements. The interference depends on the operating conditions of the
plasma (e.g. power, sample introduction, gas flowrate or observation height) and differ from element to
element. Improvement of the plasma conditions can therefore reduce excitation interferences. Other
possibilities are dilution of the solutions, matrix matching or the standard addition technique.
5.5 Chemical interferences
Chemical interferences are not significant with the ICP-AES technique, but if observed, they can be
minimized by a careful selection of operating conditions (e.g. radio frequency power, observation
position, gas flow rate and so forth).
5.6 Memory interferences
Memory interferences result when analytes in a previous sample contribute to the signals measured in a
new sample. This type of interference can be caused by sample deposits or the accumulation in pump
tubing, nebulizer, spray chamber or plasma torch. The possibility of memory interferences should be
recognized within an analytical run and suitable rinse steps and rinse times should be used.
6 Reagents
All reag
...