SIST 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
Relations
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
SIST EN ISO 660:2020 is a standard published by the Slovenian Institute for Standardization (SIST). 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.
SIST 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.
SIST EN ISO 660:2020 has the following relationships with other standards: It is inter standard links to SIST EN ISO 660:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST 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 SIST 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.
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Phone: +41 22 749 01 11
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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
...
SIST EN ISO 660:2020 표준은 동물 및 식물의 지방과 오일에서 산도의 측정을 위한 문서로서, 두 가지 적정법과 하나의 전위법 등 세 가지 방법을 명시하고 있습니다. 이 표준의 주요 강점은 다양한 동물성과 식물성 지방 및 오일에 대한 산도 측정을 위한 명확한 절차를 제공한다는 점입니다. 이 표준은 정제된 지방과 원유, 비누찌꺼기 지방산 및 기술적 지방산을 포함하여 넓은 범위에서 적용될 수 있습니다. 이러한 포괄적인 범위는 식품 산업 또는 화학 산업 내에서 산도 조절이 중요한 역할을 하는 제품에 대한 신뢰할 수 있는 테스트 방법을 제공합니다. 비록 방법들이 비특이적이기 때문에 광물산, 자유 지방산 및 기타 유기산을 구분하는 데는 적용되지 않지만, 산도는 주로 산가로 표현되며 이는 해당 제품의 품질 관리에 필수적인 요소입니다. 이러한 이유로 SIST EN ISO 660:2020 표준은 식품 안전 및 품질 보증을 위한 중요한 기준이 됩니다. 물론 이 표준은 우유 및 유제품에서 유래한 지방은 적용대상에서 제외하므로, 특정 제품군에 대한 명확한 지침을 제공합니다. 이는 사용자가 특정 산업 요구사항을 충족하기 위해 이 기준을 활용할 수 있도록 합니다. SIST EN ISO 660:2020은 동물 및 식물 지방과 오일의 산도 측정을 위한 국제적 기준으로, 신뢰성 및 품질 관리를 위한 필수적인 도구로 자리잡고 있습니다.
The SIST EN ISO 660:2020 standard provides a comprehensive and methodical approach to determining the acid value and acidity in animal and vegetable fats and oils, crucial for ensuring quality and safety in food and industrial applications. The document's scope encompasses a variety of fats, specifically refined and crude vegetable or animal fats and oils, including soap stock fatty acids and technical fatty acids, making it highly relevant for industries dealing with such products. One of the key strengths of this standard is its specification of three distinct methods for measuring acidity-two titrimetric and one potentiometric. This flexibility allows for wide applicability and choice based on the needs of different laboratories and production processes. The titrimetric methods are particularly valuable as they provide quantifiable results through established titration techniques, which are widely recognized and utilized. Another notable aspect of the SIST EN ISO 660:2020 is its clear delineation of what is included and excluded within its scope, notably the exclusion of waxes and the clear stipulation that it does not apply to milk and milk products. This precision aids users in understanding when and how to implement the standard effectively without ambiguity. However, it is important to note that the methods described within this standard are non-specific in nature, meaning that while they are effective for overall acid determination, they do not differentiate between types of acids, such as mineral acids or various organic acids. This characteristic is an essential consideration for users aiming for detailed analysis, as it reinforces the necessity for complementary testing methods when specific properties of the acids present need to be evaluated. In summary, the SIST EN ISO 660:2020 standard excels in providing structured methods for acidity determination in fats, reinforcing its relevance across various applications within the food and industrial sectors. The inclusion of both titrimetric and potentiometric methods enhances its usability, while its clear scope ensures that users can accurately apply the standard in appropriate contexts.
SIST EN ISO 660:2020は、動物および植物の脂肪および油脂の酸価および酸度の測定に関する標準化文書であり、その適用範囲は非常に重要です。この標準は、動物と植物の脂肪を対象とした酸度測定のための三つの方法（二つの滴定法と一つの電位法）を定めており、これにより、食品業界や化粧品産業などの分野での品質管理が容易になります。 標準の主要な強みは、その包括的なアプローチにあります。精製および未精製の植物または動物の脂肪と油脂、石鹸ストック脂肪酸、技術的脂肪酸に適用できるため、多様な業界での利用が期待されます。また、酸度を酸価として表現することが推奨されており、従来の方法で計算する場合にも対応している点が評価されます。 ただし、この標準はミネラル酸、自由脂肪酸、その他の有機酸の区別を行うための特定の方法を含まないため、注意が必要です。したがって、酸価には存在する可能性のあるミネラル酸も含まれることが明記されています。これにより、すべての酸の影響を考慮した結果が得られ、信頼性の高いデータが得られます。 さらに、MILKおよびミルク製品（または乳から来る脂肪）がこの文書の適用範囲から除外されていることも特筆すべき点です。これにより、特定の用途における精度が向上し、誤解を招くことなく、より正確な測定が可能となります。 総じて、SIST EN ISO 660:2020は、動物および植物の脂肪および油脂の酸度を測定するための確立された手法を提供しており、その関連性と信頼性は非常に高いと言えるでしょう。この標準は、品質管理の観点からも、さらに多くの分野での応用の可能性を秘めています。
La norme SIST EN ISO 660:2020 traite de la détermination de la valeur d'acidité et de l'acidité dans les graisses et huiles animales et végétales, constituant un document essentiel pour les industries traitant ces matières. Son champ d'application est bien défini, car elle spécifie trois méthodes de mesure, dont deux sont titrimétriques et une est potentiométrique, permettant ainsi une évaluation précise de l'acidité des graisses. L'un des points forts de cette norme est sa capacité à s'appliquer à une large gamme de matières, incluant les graisses et huiles animales et végétales raffinées et brutes, ainsi que les acides gras techniques et de savon. Cela lui confère une grande pertinence dans divers secteurs tels que l'alimentation, l'industrie chimique et la cosmétique, où un contrôle rigoureux de la qualité des graisses est indispensable. Cependant, il est important de noter que la norme ne permet pas de différencier les acides minéraux, les acides gras libres et d'autres acides organiques. Cela signifie que la valeur d'acidité inclura tout acide minéral présent, ce qui peut être un aspect à considérer lors de l'interprétation des résultats. De plus, l'exclusion des produits laitiers de son champ d'application souligne la nécessité d'une spécialisation dans les méthodes de mesure pour différents types de graisses et d'huiles. En somme, la norme SIST EN ISO 660:2020 est un document crucial qui apporte des méthodes fiables pour la détermination de l'acidité, renforçant ainsi la qualité et la sécurité des produits gras utilisés dans divers domaines. Son adoption permet aux professionnels de se conformer aux exigences réglementaires et de garantir la qualité des produits qu'ils offrent.
Die Norm SIST EN ISO 660:2020 beschreibt präzise Methoden zur Bestimmung des Säuregehalts in tierischen und pflanzlichen Fetten und Ölen sowie in Fettsäuren. Der Anwendungsbereich dieser Norm ist klar definiert und umfasst sowohl raffinierte als auch rohe Fette, einschließlich Fettsäuren aus Seifenbestandteilen oder technischen Fettsäuren. Positiv hervorzuheben ist, dass die Norm zwei titrimetrische und eine potentiometrische Methode für die Bestimmung des Säuregehalts bereitstellt, was ihre Anwendung für verschiedene Nutzergruppen erleichtert. Ein wesentlicher Stärke der Norm liegt in ihrer Flexibilität, da sie es ermöglicht, den Säuregehalt sowohl als Säurewert als auch konventionell als Säuregehalt auszudrücken. Dies fördert eine einheitliche Bewertung und Interpretation der Ergebnisse in verschiedenen industriellen Anwendungen. Außerdem ist die Norm besonders relevant für die Qualitätskontrolle in der Lebensmittelindustrie, da der Säuregehalt ein entscheidendes Kriterium für die Frische und die Qualität von Fetten und Ölen darstellt. Trotz ihrer umfassenden Anwendungsmöglichkeiten ist zu beachten, dass die Norm aufgrund der nicht spezifischen Methoden keine Unterscheidung zwischen mineralischen Säuren, freien Fettsäuren und anderen organischen Säuren ermöglicht. Dies führt dazu, dass der ermittelte Säurewert auch mineralische Säuren enthalten kann, was je nach Anwendungszweck berücksichtigt werden sollte. Die Ausschlussklausel für Milchprodukte und Fette aus Milchprodukten ist ein weiterer wichtiger Aspekt, der die Norm klar abgrenzt und darauf hinweist, dass spezifische Normen für diese Produkte existieren sollten. Dies unterstützt die Genauigkeit und Relevanz der Norm innerhalb des festgelegten Bereichs. Insgesamt bietet die SIST EN ISO 660:2020 klare Richtlinien zur Bestimmung des Säuregehalts in verschiedenen Fetten und Ölen, was sowohl für die Hersteller als auch für die Qualitätssicherung von großer Bedeutung ist. Die Norm stärkt somit die Einheitlichkeit der Qualitätsstandards in der Branche und fördert die Transparenz in der Produktbewertung.
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