EN 1245:2011
(Main)Adhesives - Determination of pH
Adhesives - Determination of pH
This European Standard specifies a method for the determination by electrometry of the pH of adhesives, their basic constituents and related products using a pH meter equipped with a glass and silver reference combined electrode.
This standard is applicable to products supplied in an aqueous medium, and of known concentration, and to products which can be dissolved, dispersed or suspended in water. It is not applicable to adhesives that react with water.
NOTE The accuracy of the method decreases at pH values above 11.
Klebstoffe - Bestimmung des pH-Wertes
Diese Europäische Norm legt ein elektrometrisches Verfahren zur Bestimmung des pH-Wertes von Kleb-stoffen, ihrer Grundbestandteile und von verwandten Produkten mit einem pH-Messgerät fest, das mit einer kombinierten Glas- und Silberreferenzelektrode ausgestattet ist.
Diese Norm ist anwendbar bei Produkten, die in einem wässrigen Medium mit bekannter Konzentration geliefert werden, und bei Produkten, die in Wasser gelöst, dispergiert oder suspendiert werden können. Sie ist nicht anwendbar bei Klebstoffen, die mit Wasser reagieren.
ANMERKUNG Die Genauigkeit des Verfahrens nimmt bei pH-Werten über 11 ab.
Adhésifs - Détermination du pH
La présente Norme européenne spécifie une méthode de détermination électrométrique du pH des adhésifs, de leurs constituants de base et des produits connexes au moyen d'un pH-mètre muni d'une électrode de référence combinée en argent et en verre.
La présente norme s'applique aux produits présentés en milieu aqueux, et caractérisés par une concentration connue, ainsi qu'aux produits pouvant être mis en solution, dispersion ou suspension dans l'eau. Elle ne s'applique pas aux produits qui réagissent avec l'eau.
NOTE La précision de la méthode décroit pour des valeurs de pH supérieures à 11.
Lepila - Določevanje pH
Ta evropski standard določa metodo določevanja pH lepil, njihovih osnovnih sestavin in sorodnih proizvodov z elektrometrijo s pH-metrom, opremljenim s stekleno in srebrno referenčno kombinirano elektrodo.
Ta standard velja za proizvode, ki se dostavljajo v vodnem mediju in z znano koncentracijo, in za proizvode, ki se lahko raztopijo, razpršijo ali suspenirajo v vodi. Ne velja za lepila, ki reagirajo z vodo.
OPOMBA: Natančnost metode se niža pri pH vrednostih nad 11.
General Information
- Status
- Published
- Publication Date
- 19-Apr-2011
- Withdrawal Date
- 30-Oct-2011
- Technical Committee
- CEN/TC 193 - Adhesives
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 12-Jul-2023
- Completion Date
- 14-Apr-2025
Relations
- Effective Date
- 13-Jun-2009
Overview
EN 1245:2011 is a European Standard established by CEN, detailing a precise method for determining the pH of adhesives and related products using electrometry. This standard specifies the use of a pH meter equipped with a combined glass and silver reference electrode to measure the pH of adhesives supplied in an aqueous medium or those that can be dissolved, dispersed, or suspended in water. It excludes adhesives that chemically react with water. Accurate pH measurement is crucial for quality control and ensuring adhesive performance in industrial applications.
Key Topics
- Scope & Applicability: Applies to adhesives with known concentration in aqueous media and related constituents but not to adhesives reactive with water.
- Measurement Principle: Electrochemical determination of pH by measuring potential difference between a glass electrode and a silver reference electrode in the sample.
- Electrodes & Equipment: Use of combined glass and silver/silver chloride electrodes with a high input impedance pH meter (≥10¹² Ω) and temperature compensation.
- Calibration: Calibration at two points using buffer solutions at pH 7 and either pH 4 or pH 9 to ensure meter accuracy.
- Sample Preparation: Homogenization of samples; solid or highly viscous adhesives are diluted or dispersed 1:1 with water when necessary.
- Test Conditions: Temperature control and equilibration of electrodes, buffers, and samples near 23 °C to reduce measurement errors.
- Accuracy Considerations: Method accuracy declines at pH values above 11 due to alkaline error from electrode limitations.
- Reagents: Use of deionized or distilled water (EN ISO 3696 compliant) and specifically prepared or commercially available buffer solutions.
- Result Reporting: pH values rounded to nearest 0.1 unit and reported with test temperature and relevant sample details.
Applications
The EN 1245:2011 standard is vital for industries and laboratories involved in manufacturing, testing, and quality control of adhesives. Practical applications include:
- Adhesive Formulation: Monitoring pH to ensure chemical stability and performance during production.
- Quality Assurance: Verifying adhesive batches meet pH specifications critical for bonding effectiveness and safety.
- Compliance Testing: Ensuring products conform to European regulations and standards related to adhesive chemistry.
- Product Development: Supporting research for developing water-compatible adhesives with controlled pH characteristics.
- Environmental and Safety Monitoring: Managing waste disposal of adhesive samples and reagents following local environmental guidelines.
By adhering to EN 1245:2011, manufacturers and testing laboratories maintain consistent and reliable pH measurement practices that directly impact product quality and regulatory compliance.
Related Standards
- EN 923:2005+A1:2008 – Adhesives - Terms and Definitions, providing standardized terminology used in adhesive testing.
- EN 1067 – Adhesives - Examination and Preparation of Samples for Testing, describing proper sample handling procedures.
- EN ISO 3696:1995 – Water for Analytical Laboratory Use, defining water purity required for accurate analytical measurements.
- EN ISO 15605 – Adhesives - Sampling, outlining methods for representative adhesive sampling.
Integration with these standards ensures comprehensive and consistent adhesive testing protocols aligned with European regulatory frameworks.
Keywords: EN 1245:2011, adhesive pH determination, pH measurement, adhesives testing standard, CEN adhesives standard, pH meter calibration, pH of adhesives, European adhesive standard, pH electrode, aqueous adhesives, adhesive quality control, adhesive formulation pH
Frequently Asked Questions
EN 1245:2011 is a standard published by the European Committee for Standardization (CEN). Its full title is "Adhesives - Determination of pH". This standard covers: This European Standard specifies a method for the determination by electrometry of the pH of adhesives, their basic constituents and related products using a pH meter equipped with a glass and silver reference combined electrode. This standard is applicable to products supplied in an aqueous medium, and of known concentration, and to products which can be dissolved, dispersed or suspended in water. It is not applicable to adhesives that react with water. NOTE The accuracy of the method decreases at pH values above 11.
This European Standard specifies a method for the determination by electrometry of the pH of adhesives, their basic constituents and related products using a pH meter equipped with a glass and silver reference combined electrode. This standard is applicable to products supplied in an aqueous medium, and of known concentration, and to products which can be dissolved, dispersed or suspended in water. It is not applicable to adhesives that react with water. NOTE The accuracy of the method decreases at pH values above 11.
EN 1245:2011 is classified under the following ICS (International Classification for Standards) categories: 83.180 - Adhesives. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 1245:2011 has the following relationships with other standards: It is inter standard links to EN 1245:1998. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 1245:2011 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Klebstoffe - Bestimmung des pH-WertesAdhésifs - Détermination du pHAdhesives - Determination of pH83.180LepilaAdhesivesICS:Ta slovenski standard je istoveten z:EN 1245:2011SIST EN 1245:2011en,fr,de01-julij-2011SIST EN 1245:2011SLOVENSKI
STANDARDSIST EN 1245:20001DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1245
April 2011 ICS 83.180 Supersedes EN 1245:1998English Version
Adhesives - Determination of pH
Adhésifs - Détermination du pH
Klebstoffe - Bestimmung des pH-Wertes This European Standard was approved by CEN on 10 March 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1245:2011: ESIST EN 1245:2011
2 Contents Page Foreword .31 Scope .42 Normative references .43 Terms and definitions .44 Principle .45 Apparatus .46 Reagents .57 Sampling .58 Procedure .69 Expression of results .710 Test report .7 SIST EN 1245:2011
3 Foreword This document (EN 1245:2011) has been prepared by Technical Committee CEN/TC 193 “Adhesives”, the secretariat of which is held by AENOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2011, and conflicting national standards shall be withdrawn at the latest by October 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1245:1998. The main modifications regarding the previous version are in the Title, Foreword, 8.4 and Normative References. SAFETY STATEMENT — Persons using this document should be familiar with the normal laboratory practice, if applicable. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any regulatory conditions. ENVIRONMENTAL STATEMENT — It is understood that some of the material permitted in this standard may have negative environmental impact. As technological advantages lead to acceptable alternatives for these materials, they will be eliminated from this standard to the extent possible. At the end of the test, the user of the standard should take care to carry out an appropriate disposal of the wastes, according to local regulation. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
4 1 Scope This European Standard specifies a method for the determination by electrometry of the pH of adhesives, their basic constituents and related products using a pH meter equipped with a glass and silver reference combined electrode. This standard is applicable to products supplied in an aqueous medium, and of known concentration, and to products which can be dissolved, dispersed or suspended in water. It is not applicable to adhesives that react with water. NOTE The accuracy of the method decreases at pH values above 11. 2 Normative references The following referenced documents are indispensable for the application 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 923:2005+A1:2008, Adhesives
Terms and definitions EN 1067, Adhesives
Examination and preparation of samples for testing EN ISO 3696:1995, Water for analytical laboratory use
Specification and test methods (ISO 3696:1987) EN ISO 15605, Adhesives
Sampling (ISO 15605:2000) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 923:2005+A1:2008 and the following apply. 3.1 pH log 1/[ H+] where [H+] is the hydrogen ion concentration of the test sample in moles per cubic decimetres (mol/dm3) 4 Principle Measurement of the potential difference existing between a glass electrode and a reference electrode immersed in the aqueous dispersion maintained at the specified test temperature, and reading of this difference expressed in pH units, directly on the pH meter scale. 5 Apparatus 5.1 pH meter, with input impedance of at least 1012 , a resolution of 0,01 pH unit, and equipped for temperature compensation. 5.2 Combined electrode, a glass electrode surrounded concentrically by a silver reference electrode. The reference electrolyte (6.3) is kept in electrical contact with the sample by a porous diaphragm. The glass electrode used shall be one recommended by the manufacturer as suitable over the
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The standard EN 1245:2011 provides a comprehensive framework for the determination of pH in adhesives, making it a crucial reference for professionals dealing in the formulation, testing, and quality assurance of adhesive products. Its well-defined scope ensures that it specifically addresses products that are supplied in an aqueous medium, which is fundamental for industries reliant on water-based adhesives. One of the significant strengths of this standard is its emphasis on accuracy through the use of electrometric techniques. By specifying the use of a pH meter equipped with a glass and silver reference combined electrode, it not only promotes consistency in measurements but also facilitates the reliability of the results obtained. This is particularly valuable for manufacturers and laboratories that require precise pH determinations to uphold product quality and compliance with regulatory standards. Additionally, EN 1245:2011 recognizes the limitations of the method, notably the decrease in accuracy of pH values above 11. This acknowledgment fosters a better understanding among users and guides them in interpreting results within the appropriate context. By clarifying that the method is not suitable for adhesives that react with water, the standard helps professionals avoid common pitfalls that can arise in adhesive testing. Overall, the relevance of EN 1245:2011 in current adhesive manufacturing practices cannot be overstated. Its structured approach to pH determination not only supports product development but also ensures adherence to safety and performance regulations, thereby enhancing the overall quality assurance processes in the adhesive industry.
La norme SIST EN 1245:2011 fournit une méthode précise pour la détermination du pH des adhésifs et de leurs constituants de base, en utilisant une électrométrie avec un pH-mètre approprié. Le champ d'application de cette norme est bien défini, s'appliquant aux produits fournis en milieu aqueux et présentant une concentration connue, ainsi qu'aux produits pouvant être dissous, dispersés ou suspendus dans l'eau. Cette caractéristique de la norme assure une large pertinence dans l'industrie des adhésifs, où le contrôle du pH est essentiel pour garantir la qualité et la performance des produits. Un des points forts de cette norme est sa capacité à standardiser la méthode de mesure, permettant ainsi une comparabilité entre les résultats obtenus dans différents laboratoires et contextes d'application. Cela renforce la crédibilité des analyses de pH et assure une confiance accrue dans les produits finis. De plus, bien que la norme ne soit pas applicable aux adhésifs réagissant avec l'eau, elle offre une base solide pour la plupart des adhésifs couramment utilisés dans l'industrie. La mention que l'exactitude de la méthode diminue pour des valeurs de pH supérieures à 11 met en évidence le besoin d'une application adéquate de la norme, ce qui ajoute une dimension supplémentaire à son utilisation. Cela incite les utilisateurs à se familiariser avec les limites de la méthode tout en soulignant l'importance d'une gestion rigoureuse du pH dans les formulations d'adhésifs. En somme, la norme SIST EN 1245:2011 est d'une grande pertinence pour les fabricants et les laboratoires d'analyse dans le domaine des adhésifs, offrant une approche standardisée et fiable pour la détermination du pH, un paramètre essentiel à la qualité des produits adhésifs.
SIST EN 1245:2011 표준은 접착제 및 그 기본 성분의 pH를 전기측정을 통해 결정하는 방법을 명시한 유럽 표준입니다. 이 표준은 수용성 매체에 공급된 제품과 알려진 농도의 제품, 그리고 물에 용해, 분산 또는 현탁될 수 있는 제품에 적용됩니다. 그러나 물과 반응하는 접착제에는 적용되지 않는다는 점을 유의해야 합니다. 이 표준의 강점 중 하나는 정확하고 신뢰할 수 있는 pH 측정 방법을 제공한다는 것입니다. 전극의 조합을 이용한 전기화학적 방법은 다양한 접착제의 pH를 정밀하게 측정할 수 있도록 설계되어 있어, 연구 및 산업 현장에서의 활용도가 높습니다. 특히, pH가 11을 초과할 경우 측정의 정확성이 감소한다는 주의 사항은 사용자에게 중요한 참고사항이 될 수 있습니다. SIST EN 1245:2011 표준은 시장에서 접착제의 품질을 보장하고 표준화된 테스트 방법을 제공함으로써, 제품의 일관성과 안전성을 높이는 데 중요한 역할을 합니다. 이러한 덕분에 다양한 산업 분야에서 경제 효율성을 극대화할 수 있으며, 특히 화학 산업 및 조립 산업에서의 활용도가 두드러집니다. 따라서, 이 표준은 접착제의 pH 측정에 있어 신뢰할 수 있는 기준을 마련하여, 관련 제품의 품질 관리를 지원하는 데 매우 중요한 문서입니다.
Die Norm EN 1245:2011 bietet ein fundiertes Verfahren zur Bestimmung des pH-Wertes von Klebstoffen, deren Grundbestandteilen und verwandten Produkten durch Elektrometrie. Ihr Anwendungsbereich ist klar definiert: Sie bezieht sich auf Produkte, die in einem wässrigen Medium bereitgestellt werden und eine bekannte Konzentration haben. Ebenso werden Produkte abgedeckt, die in Wasser gelöst, dispergiert oder suspendiert werden können. Es ist jedoch wichtig zu beachten, dass diese Norm nicht für Klebstoffe gilt, die mit Wasser reagieren. Ein bemerkenswerter Stärke der EN 1245:2011 liegt in der Verwendung eines pH-Messgeräts, das mit einer kombinierten Glaselektrode und einer Silberreferenzelektrode ausgestattet ist. Diese technische Spezifikation gewährleistet eine präzise und zuverlässige Messung des pH-Wertes, was für die Qualitätssicherung von Klebstoffen von großer Bedeutung ist. Die Norm bietet eine einheitliche Methode, die für Hersteller und Prüfinstitute von erheblichem Nutzen ist, da sie eine konsistente Qualität und Vergleichbarkeit der Testergebnisse sichert. Ein weiterer relevanter Punkt ist die Berücksichtigung der Genauigkeit des Verfahrens, die sich bei pH-Werten über 11 verringert. Dies weist auf die Sensibilität der Methode hin und fordert Anwender dazu auf, bei der Auswahl von Klebstoffprodukten besondere Vorsicht walten zu lassen. Insgesamt ist die EN 1245:2011 eine essentielle Norm für die Branche, da sie eine standardisierte Methodik zur pH-Bestimmung von Klebstoffen bereitstellt. Durch ihre klare Fokussierung auf wässrige Lösungen gewährleistet sie die Relevanz und Anwendbarkeit in einem breiten Spektrum von Anwendungen.
SIST EN 1245:2011は、接着剤及びその基本成分、関連製品のpHを電気測定法によって測定するための方法を定めた欧州標準です。この標準は、既知の濃度で水性媒体に供給される製品や、水に溶解、分散、または懸濁可能な製品に適用されます。また、水と反応する接着剤には適用されない点も重要です。 この標準の強みは、信頼性の高い測定手法を提供する点にあります。ガラス及び銀の参照を組み合わせた電極を使用することにより、pHメーターによる測定が可能なため、接着剤の性能や適用条件を理解する上での基礎データを提供します。これにより、製品開発や品質管理のプロセスにおいて重要な役割を果たします。 さらに、SIST EN 1245:2011は、接着剤業界における科学的な基準を設定し、製品の一貫性や品質を確保するための重要な指針となります。特に、pHが11を超える場合にはこの手法の精度が低下することに注意が必要であり、使用する際にはその点を考慮することが求められます。このように、この標準は接着剤の性質把握において不可欠なものであり、業界の専門家にとって非常に重要です。
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