EN 17041:2018
(Main)Fertilizers - Determination of boron in concentrations ≤ 10 % using spectrometry with azomethine-H
Fertilizers - Determination of boron in concentrations ≤ 10 % using spectrometry with azomethine-H
This European Standard specifies a method for the determination of total and water extractable boron in mineral fertilizers containing less than or equal to 10 % boron. The method is not suitable for fertilizers with Fe concentrations more than twenty times higher than the concentration of boron.
This method is applicable to water and aqua regia fertilizer extracts obtained according to EN 16962 and/or EN 16964.
The method can also be used for the determination of boron in mineral fertilizers containing more than 10 % boron after appropriate dilution of the extracts.
Düngemittel - Bestimmung von Bor in Konzentrationen ≤ 10 % durch Spektrometrie mit Azomethin-H
Diese Europäische Norm legt ein Verfahren zur Bestimmung von Gesamtbor und aus Wasser extrahierbarem Bor in mineralischen Düngemitteln fest, die weniger oder gleich 10 % Bor enthalten. Das Verfahren eignet sich nicht für Düngemittel mit Fe-Konzentrationen, die mehr als zwanzig Mal höher sind als die Konzentration an Bor.
Die Extraktionsverfahren sind in prEN 16962 und/oder prEN 16964 festgelegt.
Das Verfahren kann auch für die Bestimmung von Bor in mineralischen Düngemitteln, die mehr als 10 % Bor enthalten, nach entsprechender Verdünnung der Extrakte verwendet werden.
Engrais - Dosage du bore dans des concentrations ≤ 10 % par spectrométrie avec l'azomethine-H
La présente Norme européenne spécifie une méthode pour le dosage du bore total et du bore extractible à l’eau dans des engrais minéraux contenant au plus 10 % de bore. La méthode ne convient pas pour les engrais ayant des concentrations en Fe supérieures à vingt fois la concentration en bore.
Cette méthode est applicable aux extraits d’engrais aqueux et à l’eau régale préparés conformément à l’EN 16962 et/ou à l’EN 16964.
La méthode peut également être utilisée pour le dosage du bore dans des engrais minéraux contenant plus de 10 % de bore après une dilution appropriée des extraits.
Gnojila - Določevanje bora v koncentracijah, manjših ali enakih 10 %, s spektrometrijo z azometinom-H
Ta dokument določa postopek za določevanje skupne vsebnosti bora in bora, ki ga je mogoče ekstrahirati z vodo, v mineralnih gnojilih, ki vsebujejo manj kot oziroma 10 % bora, s spektrometrijo z azometinom-H. Metoda ni primerna za gnojila s koncentracijami Fe, ki za več kot 20-krat presegajo koncentracijo bora.
General Information
- Status
- Published
- Publication Date
- 12-Jun-2018
- Withdrawal Date
- 30-Dec-2018
- Technical Committee
- CEN/TC 260 - Fertilizers and liming materials
- Drafting Committee
- CEN/TC 260/WG 7 - Chemical analysis
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 04-Jun-2024
- Completion Date
- 14-Apr-2025
Overview
EN 17041:2018 specifies a spectrophotometric method using azomethine‑H for the determination of total and water‑extractable boron in mineral fertilizers. The method is designed for fertilizers containing ≤ 10 % boron (and may be used for higher concentrations after appropriate dilution). It applies to fertilizer extracts prepared by water extraction or aqua regia extraction according to EN 16962 and EN 16964.
Key topics and requirements
- Scope and limitations
- Intended for mineral fertilizers with boron ≤ 10 %; usable for higher boron after dilution.
- Not suitable where iron (Fe) concentration exceeds 20× the boron concentration (iron causes interference).
- Analytical principle
- Boron forms a yellow complex with azomethine‑H, which is measured spectrophotometrically.
- EDTA is used to mask interfering ions; organic‑matter removal of extracts is required as per EN 16962.
- Reagents and materials
- Use analytical‑grade reagents with negligible boron content; analytical water conforming to ISO 3696.
- Key reagents: azomethine‑H reagent, EDTA buffer, ascorbic acid, nitric acid for dilutions.
- Minimize contact with borosilicate glass - use suitable plastic or silica ware for storage and handling.
- Calibration and quality control
- Calibration solutions and blanks are mandatory; results are calculated against a calibration curve and corrected for blank and dilution factors.
- Follow specified sample preparation (EN 1482 series for sampling/sample prep).
- Performance and validation
- The method was compared with ICP‑AES (ICP‑AES offers lower labour intensity); spectrophotometry is a reliable, lower‑cost alternative but more sensitive to interferences and requires careful sample prep.
Applications and who should use it
- Fertilizer manufacturers - routine QC and product verification of boron content.
- Independent analytical laboratories - compliance testing, certification and reporting of boron levels.
- Regulatory authorities - enforcement of product labelling and safety limits for boron in fertilizers.
- Agronomic researchers - assessing boron availability and soil/fertilizer interactions using standardized extraction methods.
- Situations where ICP‑AES is not available - spectrophotometry provides an accessible alternative when properly validated in the laboratory.
Related standards
- EN 16962 - Extraction of water‑soluble micro‑nutrients and removal of organic compounds (applicable extraction procedure).
- EN 16964 - Extraction of total micro‑nutrients using aqua regia.
- EN 1482‑2 - Sample preparation for fertilizers and liming materials.
- ISO 3696 / EN ISO xxx - Water for analytical laboratory use (required reagent water quality).
Keywords: EN 17041:2018, boron determination, azomethine‑H, spectrophotometry, fertilizers, EN 16962, EN 16964, EDTA masking, ICP‑AES comparison, fertilizer testing.
Frequently Asked Questions
EN 17041:2018 is a standard published by the European Committee for Standardization (CEN). Its full title is "Fertilizers - Determination of boron in concentrations ≤ 10 % using spectrometry with azomethine-H". This standard covers: This European Standard specifies a method for the determination of total and water extractable boron in mineral fertilizers containing less than or equal to 10 % boron. The method is not suitable for fertilizers with Fe concentrations more than twenty times higher than the concentration of boron. This method is applicable to water and aqua regia fertilizer extracts obtained according to EN 16962 and/or EN 16964. The method can also be used for the determination of boron in mineral fertilizers containing more than 10 % boron after appropriate dilution of the extracts.
This European Standard specifies a method for the determination of total and water extractable boron in mineral fertilizers containing less than or equal to 10 % boron. The method is not suitable for fertilizers with Fe concentrations more than twenty times higher than the concentration of boron. This method is applicable to water and aqua regia fertilizer extracts obtained according to EN 16962 and/or EN 16964. The method can also be used for the determination of boron in mineral fertilizers containing more than 10 % boron after appropriate dilution of the extracts.
EN 17041:2018 is classified under the following ICS (International Classification for Standards) categories: 65.080 - Fertilizers. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 17041:2018 is associated with the following European legislation: EU Directives/Regulations: 2003/2003, 2019/1009; Standardization Mandates: M/335. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.$]RPHWKLQ+OD]RPHWKLQH+D]RPHWKLQH+65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 17041:2018SIST EN 17041:2018en,fr,de01-september-2018SIST EN 17041:2018SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 17041
June
t r s z ICS
x wä r z r English Version
Fertilizers æ Determination of boron in concentrations ≤
s r
¨ using spectrometry with azomethineæH Engrais æ Dosage du bore dans des concentrations ≤
s r
¨ par spectrométrie avec l 5azomethineæH
Düngemittel æ Bestimmung von Bor in Konzentrationen ≤
s r
¨ durch Spektrometrie mit AzomethinæH This European Standard was approved by CEN on
t x February
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s y r v sã t r s z ESIST EN 17041:2018
European foreword . 3 Introduction . 4 1 Scope . 5 2 Normative references . 5 3 Terms and definitions . 5 4 Principle . 5 5 Sampling and sample preparation . 5 6 Reagents . 6 7 Apparatus . 7 8 Procedure. 7 8.1 General . 7 8.2 Preparation of calibration solutions . 7 8.3 Preparation of the test solutions . 7 8.4 Preparation of the correction solutions . 8 8.5 Colour development . 8 8.6 Measurement . 8 9 Calculation and expression of the result . 8 10 Test report . 9 Annex A (infor– Comparison of ICP-AES method and spectrophotometric method with azomethine-H . 10 A.1 Introduction . 10 A.2 Validation based on water extraction. 10 A.2.1 Test materials used in the validation study . 10 A.2.2 Results of the validation study . 11 A.2.3 Conclusions . 12 A.3 Validation based on aqua regia extraction . 12 A.3.1 Test materials used in the validation study . 12 A.3.2 Results of the validation study . 14 A.3.3 Conclusions . 15 Bibliography . 16
t r s zá and conflicting national standards shall be withdrawn at the latest by December
t r s zä Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rightsä CEN shall not be held responsible for identifying any or all such patent rightsä This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Associationä According to the CEN-CENELEC Internal Regulationsá the national standards organisations of the following countries are bound to implement this European Standardã Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and the United Kingdomä SIST EN 17041:2018
1 This European Standard is part of a modular approach and concerns the analytical measurement stepä òModularó means that a test standard concerns a specific step in assessing a property and not the whole chain of measurementsä The determination of boron in fertilizers can be executed by inductively coupled plasma-atomic --H is more labour intensive than ICP-EN
s x { x uand it is an option when ICP-AES is not availableä The spectrophotometric determination can be influenced by iron and more attention is necessary also to organic matter removal and interferences from extract colourä The procedure for removal of organic matter from the extracts is given in EN 16962ä WARNING — Persons using this European Standard should be familiar with normal laboratory practiceä This European Standard does not purport to address all of the safety issuesá if anyá associated with its useä It is the responsibility of the user to establish appropriate health and safety practices and to ensure compliance with any national regulatory conditionsä IMPORTANT — It is absolutely essential that tests conducted according to this European Standard are carried out by suitably trained staffä SIST EN 17041:2018
s r
¨ boronä The method is not suitable for fertilizers with Fe concentrations more than twenty times higher than the concentration of boronä This method is applicable to water and aqua regia fertilizer extracts obtained according to EN 16962 EN 16964ä The method can also be used for the determination of boron in mineral fertilizers containing more than 10
¨ boron after appropriate dilution of the extractsä 2 Normative references The following documentsá in whole or in partá are normatively referenced in this document and are indispensable for its applicationä For dated referencesá only the edition cited appliesä For undated ppliesä EN 1482-2á Fertilizers and liming materials - Sampling and sample preparation - Part 2: Sample preparation EN 12944-1á Fertilizers and liming materials and soil improvers - Vocabulary - Part 1: General terms EN 12944-2á Fertilizers and liming materials and soil improvers - Vocabulary - Part 2: Terms relating to fertilizers EN 16962á Fertilizers - Extraction of water soluble micro-nutrients in fertilizers and removal of organic compounds from fertilizer extracts EN 16964á Fertilizers - Extraction of total micro-nutrients in fertilizers using aqua regia EN ISO
u x { xá Water for analytical laboratory use - Specification and test methods (ISO 3696) 3 Terms and definitions For the purposes of this documentá the terms and definitions given in EN 12944-1 and EN 12944-2 applyä 4 Principle Boron reacts with azomethine-H and the yellow complex produced is determined spectrophotometrically at
v s r nmä Interfering ions are masked with ethylenediaminetetraacetic acid -EDTA complex is removed by
5 Sampling and sample preparation Sampling is not part of the method specified in this documentä A recommended sampling method is specified in EN 1482-1 2 Sample preparation shall be carried out in accordance with EN 1482-2ä The sample extracts shall be prepared in accordance with EN 16962 EN 16964ä SIST EN 17041:2018
t according to EN ISO
u x { x and free from boronä 6.2 EDTA buffer solutionä 6.2.1 Ammonium acetate
uCOONH4 6.2.2 Disodium salt of ethylenediaminetetraacetic acid 2 6.2.3 Acetic acidá
=
sá s s
Place in a
w r r
yä v
xä s g ammonium acetate
xä tä s
xä tä t ml
xä tä u xä s yä { ±
yä x 6.3 Azomethine-H solutionä 6.3.1 Azomethine-H 17H12NNaO8S2 6.3.2 Ascorbic acid 6H8O6 Place in a 200
yä u): 10
xä t mg of azomethine-H
xä uä s
xä uä t xä ssolution is stable for three daysä 6.4 Boron calibration solutionsä 6.4.1 Boron stock solutioná
s r r
Dissolve
rá w y s 9
uBO u xä s) in a 1 000
yä w xä s yä x to 8)
¹Cä Commercially available stock solutions with adequate specification may be usedä The solution is considered to be stable for more than one yeará but in reference to guaranteed
...
Die Norm EN 17041:2018 bietet eine präzise Methodik zur Bestimmung von Bor in mineralischen Düngemitteln mit einem Gehalt von ≤ 10 % Bor. Der Standardscope legt fest, dass diese europäische Norm hervorragend für die Analyse von Gesamt- und wasserlöslichem Bor in Düngemitteln geeignet ist, was sie für die Landwirtschaft und die Düngemittelindustrie von großer Relevanz macht. Ein herausragendes Merkmal der EN 17041:2018 ist die Spezifität des Verfahrens, das auf die Analyse von Düngemitteln mit geringeren Bor-Konzentrationen abzielt und somit die Bedürfnisse diverser Anwendergruppen erfüllt. Die Methode ist besonders nützlich in Situationen, in denen die Bor-Konzentration unter 10 % liegt, was sie zu einem wertvollen Werkzeug für die Qualitätskontrolle von Düngemitteln macht. Darüber hinaus berücksichtigt die Norm die Möglichkeit der Anwendung auf Düngemittel mit höheren Bor-Konzentrationen, sofern eine Verdünnung der Extrakte erfolgt. Dies zeigt die Flexibilität und Anpassungsfähigkeit der Norm an verschiedene Anforderungen in der Düngemittelanalyse. Die vorgesehene Methode zur Erstellung von Wasser- und Aqua-Regia-Extrakten gemäß EN 16962 und/oder EN 16964 stellt sicher, dass Anwender konsistente und zuverlässige Ergebnisse erzielen können. Die EN 17041:2018 stellt somit ein wichtiges Instrument dar, um die Qualität und Sicherheit von mineralischen Düngemitteln zu gewährleisten. Ihre präzisen Vorgaben tragen zu einer verbesserten Transparenz in der Düngemittelbranche bei und unterstützen die Einhaltung gesetzlicher Bestimmungen bezüglich der Nährstoffgehalte und deren Auswirkungen auf Umwelt und Gesundheit. In Anbetracht der globalen Anforderungen an nachhaltige Landwirtschaft und effiziente Düngemittelnutzung ist die Relevanz dieser Norm unbestreitbar.
SIST EN 17041:2018 문서는 무기 비료에서 보론을 측정하는 표준화된 방법을 규명하고 있습니다. 이 표준의 주요 목적은 보론 농도가 10% 이하인 비료에서 총 보론 및 수용성 보론을 측정하는 방법을 규정하는 것입니다. 또한, 철(Fe) 농도가 보론 농도의 20배 이상인 비료에는 이 방법이 적합하지 않다는 점을 명확히 하고 있습니다. 이 표준의 큰 장점은 유럽 기준으로 설정되어 있어, 비료 산업의 일관성 있는 품질 관리를 가능하게 한다는 점입니다. 특히 EN 16962 및 EN 16964에 따라 추출된 수용성 및 아쿠아 레지아 비료 추출물을 사용하여 보론을 측정할 수 있으므로, 연구자와 생산자 모두에게 실질적으로 유용한 가이드라인을 제공합니다. 또한, 10% 이상의 보론 농도를 가진 비료에서도 적절한 희석 후 이 방법을 사용할 수 있다는 점은 비료 제조업체들로 하여금 더 넓은 범위의 제품에 대해 공정하고 일관된 분석을 수행할 수 있게 합니다. 따라서 이 표준은 비료의 성능을 극대화하고, 농업 생산성에 기여할 수 있는 중요한 도구로 자리매김하고 있습니다. SIST EN 17041:2018 문서는 비료 산업에서 보론 측정의 표준화를 통해, 효율성과 정확성을 제고하는 데 기여하고 있으며, 이는 농업에서 비료의 올바른 사용과 관련하여 매우 중요한 요소로 작용합니다.
La norme SIST EN 17041:2018 présente une méthode précise pour la détermination du bore dans les engrais minéraux, spécifiquement pour ceux dont la concentration en bore est inférieure ou égale à 10 %. L'étendue de cette norme est bien définie, car elle s'applique à la fois aux échantillons d'engrais extraits par des méthodes reconnues, comme celles stipulées dans les normes EN 16962 et EN 16964, garantissant ainsi une approche systématique et fiable pour l'analyse du bore. Parmi les points forts de la norme, on peut noter sa capacité à fournir des résultats évitant les interférences significatives, en particulier dans le cas des engrais contenant des concentrations élevées de fer. La spécification limitant l'utilisation de cette méthode à des engrais ne dépassant pas une concentration de fer vingt fois supérieure à celle du bore est essentielle pour assurer la précision des mesures. La norme est particulièrement pertinente dans le contexte actuel, où la gestion des nutriments et des minéraux dans l'agriculture devient de plus en plus cruciale. La capacité de cette méthode à déterminer à la fois le bore total et le bore extrait à l'eau renforce sa valeur pour les industriels et les chercheurs, permettant une meilleure compréhension des caractéristiques des engrais minéraux. En outre, la possibilité d'appliquer cette méthode également à des échantillons contenant plus de 10 % de bore, à condition de procéder à une dilution appropriée, montre la flexibilité et la robustesse de la norme. Cela élargit les horizons d'utilisation de la norme pour divers types d'engrais, consolidant ainsi son rôle indispensable dans l'analyse des fertilisants. Ainsi, la norme SIST EN 17041:2018 se distingue par sa rigueur méthodologique et sa pertinence dans l'évaluation des engrais, contribuant à une agriculture plus durable et efficace.
The SIST EN 17041:2018 standard offers a comprehensive approach for the determination of boron in mineral fertilizers, particularly those with concentrations of ≤ 10 %. This European Standard emphasizes a reliable method utilizing spectrometry with azomethine-H, specifically designed to measure total and water-extractable boron, which is critical for assessing fertilizer quality and compliance. One of the strengths of this standard is its specificity; it clearly delineates the applicable concentration range for boron in mineral fertilizers, ensuring users can effectively employ the methodology without misapplication. The directive that the method is not suitable for fertilizers with iron concentrations exceeding twenty times that of boron is particularly noteworthy, as it safeguards the accuracy of the results by preventing interference that could skew data. Additionally, the standard encompasses the use of water and aqua regia extracts following existing methods stated in EN 16962 and EN 16964, thereby providing a clear procedural framework for practitioners. This increases the standard's relevance in both laboratory settings and practical applications, enabling stakeholders to adhere to rigorous testing protocols. Furthermore, the flexibility of the standard to accommodate samples with boron concentrations over 10 % through appropriate dilution illustrates its adaptability for a wider range of mineral fertilizers. This aspect ensures that the standard can meet diverse testing needs, allowing laboratories to maintain high accuracy and reliability in boron determination across various fertilizer formulations. In summary, SIST EN 17041:2018 stands out for its clear guidelines, specificity, and flexibility, making it a crucial reference for professionals engaged in the analysis of boron in mineral fertilizers. This standard not only enhances quality assurance in fertilizer production but also supports regulatory compliance, reflecting its significant relevance in the agricultural sector.
EN 17041:2018は、肥料中のホウ素を測定するための標準化文書であり、特にホウ素濃度が10％以下の鉱鉱肥料における水溶性および全ホウ素の定量化を目的としています。この基準は、鉱鉱肥料におけるホウ素の測定に関する明確かつ効果的な指針を提供しており、特に農業分野において重要な役割を果たします。 この標準の強みは、ホウ素の測定方法が非常に明確に定義されている点です。具体的には、試料抽出に関しては、EN 16962やEN 16964に従って得られた水および王水抽出液を使用することが求められています。これにより、肥料サンプルからのホウ素の回収率が高まり、信頼性のある結果を得ることが可能です。また、ホウ素濃度が10％を超える場合でも、適切な希釈を行うことでこの方法を適用できる点も非常に便利です。 さらに、EN 17041:2018は、鉄（Fe）の濃度がホウ素濃度の20倍以上に達している肥料には適用できないという明確な制限も示しています。これにより、測定精度が保たれ、誤った結果を避けることができます。このような規定は、農業施肥におけるホウ素の適切な管理と利用を促進し、その重要性を再確認させるものです。 総じて、EN 17041:2018は、肥料に含まれるホウ素の定量を行う際の信頼性が高く、実用的な基準を提供しています。農業界において、ホウ素の正確な決定は作物の生産性向上に寄与し、持続可能な農業プラクティスへとつながる重要な要素となります。
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