EN ISO 660:2020
(Main)Animal and vegetable fats and oils - Determination of acid value and acidity (ISO 660:2020)
Animal and vegetable fats and oils - Determination of acid value and acidity (ISO 660:2020)
This document specifies three methods (two titrimetric and one potentiometric) for the determination of acidity in animal and vegetable fats and oils, hereinafter referred to as "fats". The acidity is expressed preferably as acid value or, alternatively, as acidity calculated conventionally.
This document is applicable to refined and crude vegetable or animal fats and oils, soap stock fatty acids or technical fatty acids. It does not apply to waxes.
Since the methods are completely non-specific, they do not apply to differentiating between mineral acids, free fatty acids and other organic acids. The acid value, therefore, includes any mineral acids that are present.
Milk and milk products (or fat coming from milk and milk products) are excluded from the Scope of this document.
Tierische und pflanzliche Fette und Öle - Bestimmung der Säurezahl und der Azidität (ISO 660:2020)
Dieses Dokument legt drei Verfahren (zwei titrimetrische und ein potentiometrisches) zur Bestimmung der Azidität in tierischen und pflanzlichen Fetten und Ölen, die im Folgenden als „Fette“ bezeichnet werden, fest. Die Azidität wird vorzugsweise als Säurezahl ausgedrückt oder alternativ als konventionell berechnete Azidität.
Dieses Dokument gilt für raffinierte und rohe pflanzliche oder tierische Fette und Öle, Soapstock-Fettsäuren oder technische Fettsäuren. Es gilt nicht für Wachse.
Da die Verfahren vollkommen unspezifisch sind, gelten sie nicht zur Unterscheidung zwischen Mineralsäuren, freien Fettsäuren und sonstigen organischen Säuren. Die Säurezahl schließt daher alle vorhandenen Mineralsäuren ein.
Milch und Milcherzeugnisse (oder Fett aus Milch und Milcherzeugnissen) sind vom Anwendungsbereich dieses Dokumentes ausgenommen.
Corps gras d'origines animale et végétale - Détermination de l'indice d'acide et de l'acidité (ISO 660:2020)
Le présent document spécifie trois méthodes (deux titrimétriques et une potentiométrique) pour la détermination de l'acidité dans les corps gras d'origines animale et végétale dits «corps gras». L'acidité est exprimée, de préférence, en indice d'acide ou bien en acidité calculée conventionnellement.
Le présent document est applicable aux corps gras d'origines végétale ou animale à l'état brut ou raffinés, aux acides gras des pâtes de neutralisation ou aux acides gras de qualité technique. Il ne s'applique pas aux cires.
Ces méthodes ne sont en aucun cas spécifiques, elles ne s'appliquent donc pas à la différenciation des acides minéraux, acides gras libres et autres acides organiques. De ce fait, l'indice d'acide inclut tout acide minéral présent.
Le lait et les produits laitiers (ou la matière grasse issue du lait et des produits laitiers) sont exclus du domaine d'application du présent document.
Rastlinske in živalske maščobe in olja - Določevanje kislinskega števila in kislosti (ISO 660:2020)
General Information
- Status
- Published
- Publication Date
- 29-Sep-2020
- Withdrawal Date
- 30-Mar-2021
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 30-Sep-2020
- Completion Date
- 30-Sep-2020
Relations
- Effective Date
- 16-Jan-2019
Overview
EN ISO 660:2020 - "Animal and vegetable fats and oils - Determination of acid value and acidity" (CEN adoption of ISO 660:2020) specifies standardized laboratory procedures to measure the acid value and acidity of fats and oils. The document defines three analytical methods (two titrimetric and one potentiometric) for refined and crude vegetable and animal fats and oils, including soapstock and technical fatty acids. Waxes and milk/milk‑derived fats are excluded. Results are reported preferably as acid value (mg KOH/g) or alternatively as acidity (percent free fatty acids, conventionally as oleic acid).
Key topics and technical requirements
- Methods specified
- Two titrimetric methods (cold solvent with indicator; hot ethanol with indicator).
- One potentiometric titration (cold solvent) - potentiometric method included as a reference.
- Scope and limitations
- Applicable to refined and crude animal/vegetable fats and oils and soapstock; does not apply to waxes or milk fats.
- Methods are non‑specific: they measure total acidity and cannot distinguish free fatty acids from mineral or other organic acids (acid value therefore includes any mineral acid present).
- Reagents and solvents
- Solvent mixture typically ethanol (≈96%) and diethyl ether (peroxide‑free) or approved alternatives (e.g., tert‑butyl methyl ether, toluene); neutralization before titration is required.
- Standard NaOH or KOH solutions (ethanolic or methanolic) with known concentration are used as titrants.
- Indicators and safety
- Colour indicators: thymolphthalein or Alkali Blue 6B preferred; phenolphthalein may only be used if no alternative is available (phenolphthalein has CMR classification).
- Apparatus, sampling and precision
- References to ISO laboratory glassware standards (ISO 385, ISO 1042), sample preparation (ISO 661) and water quality (ISO 3696).
- Precision data, repeatability and reproducibility are provided in the standard.
Applications and users
- Quality control laboratories in edible oil processing, rendering and refining industries
- Food analysts and regulatory testing bodies verifying compliance and labeling
- Traders and commodity inspectors assessing oil/fat quality for purchase/sale
- Research labs studying oil degradation, storage stability or refining efficiency
EN ISO 660:2020 provides a harmonized, reproducible approach for determining acidity and acid value - essential for product specification, shelf‑life assessment, process control and regulatory compliance in the fats and oils sector.
Related standards
- ISO 661 - Preparation of test sample (fats and oils)
- ISO 385, ISO 1042 - Laboratory glassware (burettes, volumetric flasks)
- ISO 3696 - Water for analytical laboratory use
- ISO 1740 - (relevant for milk fats; milk products excluded from ISO 660:2020)
Frequently Asked Questions
EN ISO 660:2020 is a standard published by the European Committee for Standardization (CEN). Its full title is "Animal and vegetable fats and oils - Determination of acid value and acidity (ISO 660:2020)". This standard covers: This document specifies three methods (two titrimetric and one potentiometric) for the determination of acidity in animal and vegetable fats and oils, hereinafter referred to as "fats". The acidity is expressed preferably as acid value or, alternatively, as acidity calculated conventionally. This document is applicable to refined and crude vegetable or animal fats and oils, soap stock fatty acids or technical fatty acids. It does not apply to waxes. Since the methods are completely non-specific, they do not apply to differentiating between mineral acids, free fatty acids and other organic acids. The acid value, therefore, includes any mineral acids that are present. Milk and milk products (or fat coming from milk and milk products) are excluded from the Scope of this document.
This document specifies three methods (two titrimetric and one potentiometric) for the determination of acidity in animal and vegetable fats and oils, hereinafter referred to as "fats". The acidity is expressed preferably as acid value or, alternatively, as acidity calculated conventionally. This document is applicable to refined and crude vegetable or animal fats and oils, soap stock fatty acids or technical fatty acids. It does not apply to waxes. Since the methods are completely non-specific, they do not apply to differentiating between mineral acids, free fatty acids and other organic acids. The acid value, therefore, includes any mineral acids that are present. Milk and milk products (or fat coming from milk and milk products) are excluded from the Scope of this document.
EN ISO 660:2020 is classified under the following ICS (International Classification for Standards) categories: 67.200.10 - Animal and vegetable fats and oils. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 660:2020 has the following relationships with other standards: It is inter standard links to EN ISO 660:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN ISO 660:2020 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)
SLOVENSKI STANDARD
01-november-2020
Nadomešča:
SIST EN ISO 660:2009
Rastlinske in živalske maščobe in olja - Določevanje kislinskega števila in kislosti
(ISO 660:2020)
Animal and vegetable fats and oils - Determination of acid value and acidity (ISO
660:2020)
Tierische und pflanzliche Fette und Öle - Bestimmung der Säurezahl und der Azidität
(ISO 660:2020)
Corps gras d'origines animale et végétale - Détermination de l'indice d'acide et de
l'acidité (ISO 660:2020)
Ta slovenski standard je istoveten z: EN ISO 660:2020
ICS:
67.200.10 Rastlinske in živalske Animal and vegetable fats
maščobe in olja and oils
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 660
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 67.200.10 Supersedes EN ISO 660:2009
English Version
Animal and vegetable fats and oils - Determination of acid
value and acidity (ISO 660:2020)
Corps gras d'origines animale et végétale - Tierische und pflanzliche Fette und Öle - Bestimmung
Détermination de l'indice d'acide et de l'acidité (ISO der Säurezahl und der Azidität (ISO 660:2020)
660:2020)
This European Standard was approved by CEN on 28 August 2020.
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, 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 660:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 660:2020) has been prepared by Technical Committee ISO/TC 34 "Food
products" in collaboration with Technical Committee CEN/TC 307 “Oilseeds, vegetable and animal fats
and oils and their by-products - Methods of sampling and analysis” the secretariat of which is held by
AFNOR.
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 March 2021, and conflicting national standards shall
be withdrawn at the latest by March 2021.
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 supersedes EN ISO 660:2009.
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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 660:2020 has been approved by CEN as EN ISO 660:2020 without any modification.
INTERNATIONAL ISO
STANDARD 660
Fourth edition
2020-03
Animal and vegetable fats and oils —
Determination of acid value and acidity
Corps gras d'origines animale et végétale — Détermination de l'indice
d'acide et de l'acidité
Reference number
ISO 660:2020(E)
©
ISO 2020
ISO 660:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
ISO 660:2020(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents . 2
6 Apparatus . 3
7 Sampling . 3
8 Preparation of test sample . 3
9 Procedure. 3
9.1 Cold solvent method using indicator (reference method) . 3
9.2 Cold solvent method using potentiometric titration (reference method) . 4
9.3 Hot ethanol method using indicator . 4
10 Calculation . 5
10.1 General . 5
10.2 Acid value. 5
10.3 Acidity or free fatty acid content . 5
11 Precision . 6
11.1 Repeatability . 6
11.2 Reproducibility . 6
12 Test report . 6
Annex A (informative) Results of interlaboratory tests. 7
Annex B (informative) Comparison of three coloured indicators .10
Bibliography .12
ISO 660:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 11,
Animal and vegetable fats and oils, , in collaboration with the European Committee for Standardization
(CEN) Technical Committee CEN/TC 307, Oilseeds, vegetable and animal fats and oils and their by-
products — Methods of sampling and analysis, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This fourth edition cancels and replaces the third edition (ISO 660:2009), which has been technically
revised. The main changes compared with the previous edition are as follows:
— a non-applicability statement for milk and milk products has been added to the Scope because
ISO 1740 applies in these cases;
— details of a CMR classification on coloured indicators have been added;
— data from the collaborative trial carried out to support this modification have been added in
Annex B.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
INTERNATIONAL STANDARD ISO 660:2020(E)
Animal and vegetable fats and oils — Determination of acid
value and acidity
1 Scope
This document specifies three methods (two titrimetric and one potentiometric) for the determination
of acidity in animal and vegetable fats and oils, hereinafter referred to as “fats”. The acidity is expressed
preferably as acid value or, alternatively, as acidity calculated conventionally.
This document is applicable to refined and crude vegetable or animal fats and oils, soap stock fatty
acids or technical fatty acids. It does not apply to waxes.
Since the methods are completely non-specific, they do not apply to differentiating between mineral
acids, free fatty acids and other organic acids. The acid value, therefore, includes any mineral acids that
are present.
Milk and milk products (or fat coming from milk and milk products) are excluded from the Scope of this
document.
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.
ISO 385, Laboratory glassware — Burettes
ISO 661, Animal and vegetable fats and oils — Preparation of test sample
ISO 1042, Laboratory glassware — One-mark volumetric flasks
ISO 3696, Water for analytical laboratory use — Specification and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
acid value
number of milligrams of potassium hydroxide required to neutralize the free fatty acids present in 1 g
of fat, when determined in accordance with the procedure specified in this document
Note 1 to entry: The acid value is expressed in milligrams per gram.
3.2
acidity
content of free fatty acids determined according to the procedure specified in this document
Note 1 to entry: The acidity is expressed as a percentage by mass. If the result of the determination is reported as
acidity without further explanation, this is, by convention, the acidity based on the oleic acid content.
ISO 660:2020(E)
4 Principle
The sample is dissolved in a suitable solvent mixture, and the acids present are titrated with an
ethanolic or methanolic solution of sodium or potassium hydroxide.
The methods specified in 9.1 and 9.2 are reference methods.
5 Reagents
WARNING — Attention is drawn to regulations that specify the handling of hazardous substances.
Technical, organizational and personal safety measures shall be followed.
Use only reagents of recognized analytical grade, unless otherwise specified.
5.1 Solvent A for the solvent mixture (5.3), ethanol, volume fraction, φ ≈ 96 %.
As a replacement, propan-2-ol, volume fraction, φ ≈ 99 %, may be used.
5.2 Solvent
...
이 표준 문서인 EN ISO 660:2020은 동물 및 식물의 지방과 기름의 산 가치를 결정하는 방법을 규명합니다. 이 문서에서는 산도를 측정하기 위한 3가지 방법(2가지 적정법 및 1가지 전위법)을 제시하고 있으며, 이는 동물 및 식물의 지방, 즉 "지방"의 산도를 다룹니다. 산도는 주로 산 가치로 표현되며, 대안으로 전통적으로 계산된 산도로도 표현될 수 있습니다. 문서의 적용 범위는 정제된 동물 및 식물 지방과 기름, 비누 스톡 지방산 또는 기술적인 지방산에 해당하며, 왁스에는 적용되지 않습니다. 이러한 비특정적인 방법들은 광물성 산, 자유 지방산 및 기타 유기산을 구분하는 데는 적합하지 않으며, 따라서 산 가치는 존재하는 모든 광물성 산을 포함합니다. 이러한 점에서 EN ISO 660:2020은 지방의 품질과 안전성을 확인하는 데 중요한 역할을 합니다. 이 표준은 동물성 및 식물성 지방 및 기름의 품질 관리 및 분석에 필요한 신뢰할 수 있는 기준을 제공하여, 식품 산업 및 화학 산업에 있어 필수적입니다. 또한, 이 문서는 우유 및 유제품(또는 우유 및 유제품에서 나온 지방)은 제외하므로, 해당 분야에서의 적용 가능성을 명확히 할 수 있습니다. EN ISO 660:2020은 식품 및 화학 산업에서 산도 측정을 표준화하여 신뢰성을 높이고, 품질 관리를 위한 유용한 도구로 자리 잡고 있습니다. 이는 생산자와 소비자 모두에게 안전하고 품질 좋은 제품을 보장하는 데 기여하고 있습니다.
La norme EN ISO 660:2020 constitue un référentiel essentiel pour la détermination de la valeur d'acidité et de l'acidité dans les graisses et huiles animales et végétales. Son champ d'application est clairement défini, s'adressant tant aux graisses raffinées qu'aux graisses brutes, ainsi qu'aux acides gras de savon et aux acides gras techniques. Il est important de noter que cette norme ne s'applique pas aux cires, ce qui circonscrit son utilisation à un domaine précis et pertinent. La norme présente trois méthodes distinctes pour la mesure de l'acidité, deux de nature titrimétrique et une méthode potentiométrique. Cette diversité méthodologique permet une flexibilité dans l'application, tout en garantissant des résultats cohérents et fiables. L'expression de l'acidité se fait de manière préférentielle par la valeur d'acidité, mais la possibilité d'utiliser une mesure d'acidité conventionnelle élargit son applicabilité. Un des points forts de la norme est sa clarté dans les exclusions, telle que celle portant sur les produits laitiers, ce qui permet de mieux circonscrire le cadre d'utilisation pour les professionnels du secteur. Cependant, il est essentiel de souligner que les méthodes décrites sont non spécifiques ; elles ne permettent pas de distinguer les acides minéraux, les acides gras libres et d'autres acides organiques. Ainsi, la valeur d'acidité mesurée englobe tous les acides présents, minéraux compris, une consideration cruciale pour l'interprétation des résultats en fonction des besoins analytiques. Dans l'ensemble, la norme EN ISO 660:2020 se révèle être un outil fondamental pour les laboratoires et les industries impliqués dans le traitement des graisses et huiles, offrant des méthodes standardisées pour garantir la qualité des produits finis. Sa pertinence dans le domaine de l'analyse des acides assure une approche rigoureuse dans le contrôle qualitatif des matières premières et des produits dérivés.
The EN ISO 660:2020 standard provides a comprehensive framework for the determination of acid value and acidity in animal and vegetable fats and oils. By specifying three distinct methods-two titrimetric and one potentiometric-this document caters to diverse analytical needs in the food industry. Its strengths lie in the robustness of the methodologies provided, ensuring reliable results for both refined and crude fats. One of the key advantages of this standard is its applicability to a wide range of substances, including not only vegetable and animal fats but also soap stock fatty acids and technical fatty acids. This broad scope enhances its relevance in various industrial applications, making it a crucial reference for professionals working with fats and oils. However, it is worth noting that the standard does not extend to waxes, which could limit its applicability in certain contexts. The standard emphasizes the measurement of acidity either as acid value or tacitly through conventional acidity calculations. This flexibility allows users to select the most appropriate method for their specific requirements. Moreover, the non-specific nature of the methods is highlighted, underscoring that the acid value determination does not differentiate among various types of acids, including mineral and organic acids. Consequently, this standard can effectively encompass all components contributing to acidity, which is particularly beneficial for thorough quality assessments. Nonetheless, the standard clearly delineates its exclusions, such as milk and milk-derived fats, which could be a limitation for sectors that require analysis in those areas. Overall, the EN ISO 660:2020 serves as a foundational document that enhances the integrity and accuracy of acidity determinations in the fats and oils industry, making it a critical tool for professionals dedicated to maintaining quality and compliance in their products.
Die EN ISO 660:2020 ist ein entscheidendes Dokument im Bereich der Bestimmung von Säurewert und Acidität in tierischen und pflanzlichen Fetten und Ölen. Der Anwendungsbereich dieser Norm ist klar definiert und erstreckt sich über verschiedene Arten von Fetten, einschließlich raffinierter und unraffinierter pflanzlicher und tierischer Fette sowie technischer Fettsäuren. Es ist bemerkenswert, dass diese Norm methodische Ansätze anbietet, die sowohl titrimetrisch als auch potentiometrisch sind, was dem Benutzer Flexibilität und Auswahlmöglichkeiten bei der Durchführung der Messungen bietet. Ein großer Vorteil der EN ISO 660:2020 ist ihre umfassende Anwendbarkeit auf unterschiedliche Fettarten, was sie zu einem unverzichtbaren Instrument für die Lebensmittelindustrie, chemische Analysen und Qualitätskontrollen macht. Durch die Norm wird sichergestellt, dass die Bestimmung des Säurewerts einheitlich und zuverlässig erfolgt. Die einfache Handhabung der beiden titrimetrischen Methoden und der potentiometrischen Methode ermöglicht es Laboren, präzise Ergebnisse zu erzielen, die sowohl für die Qualitätssicherung als auch für die Produktentwicklung von größter Bedeutung sind. Zudem ist der Fokus der Norm auf die Messung der Acidität besonders relevant, da diese entscheidend für die Bewertung der Qualität und Frische von Fetten ist. Dies ist nicht nur in der Lebensmittelindustrie von Bedeutung, sondern auch in der Kosmetik- und Schmierstoffindustrie, wo Fettsäuren eine wichtige Rolle spielen. Die Tatsache, dass die Norm nicht für Wachse gilt und Milchprodukte von der Anwendbarkeit ausgeschlossen sind, unterstreicht die Zielgerichtetheit der Norm. Diese Spezifikationen sorgen dafür, dass die Ergebnisse der Analysen eindeutig und genau interpretiert werden können, ohne dass Verwirrungen durch andere Substanzgruppen entstehen. Insgesamt ist die EN ISO 660:2020 ein umfassendes Werk, das die hohen Standards der Qualität und Konsistenz in der Analyse von Fetten gewährleistet. Die Standardisierung der Methoden zur Bestimmung des Säurewertes ist ein wesentliches Element für alle Akteure in der Branche, die Wert auf Qualität und Compliance legen.
EN ISO 660:2020は、動物および植物の脂肪と油脂における酸価と酸度の測定方法を定めた非常に重要な標準化文書です。この文書では、酸度を測定するための三つの方法-二つの滴定法と一つの電位差法-が規定されています。この測定は、動物と植物の脂肪において、酸価または通常計算された酸度として表されます。 この標準の強みは、精製および未精製の植物または動物脂肪と油脂、石鹸ストック脂肪酸、技術的脂肪酸に広く適用できる点です。この範囲は、様々な産業における品質管理の基準を提供し、日常的に使用される材料に信頼性を持たせます。ただし、ロウなどには適用されないことを明示しているため、使用する際の誤解を防ぐことができます。 また、これは完全に非特異的な方法であるため、無機酸や遊離脂肪酸、その他の有機酸を区別するためには使用できない点も考慮する必要があります。このため、酸価には存在する無機酸も含まれることになります。この点を理解することで、測定結果の解釈においてより正確な判断が可能となります。 さらに、牛乳および乳製品（または牛乳および乳製品からの脂肪）は、この文書の適用範囲外であるため、特定の用途や製品においても明確な指針を提供します。このような明確な定義があることにより、業界関係者は適切な基準に従いながら、製品の品質を確保することができるため、非常に有益です。 このように、EN ISO 660:2020は、動物および植物の脂肪と油脂の酸価および酸度を測定するための信頼性の高い基準を提供しており、その適用範囲、強み、そして重要性を考えると、業界における非常に関連性の高い標準と言えるでしょう。
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