SS-EN 15692:2021SVENSK STANDARD

Språk: engelska / EnglishUtgåva: 2

Etanol som blandningskomponent i bensin – Bestämning av vattenhalt – Karl Fischer titreringsmetod

Ethanol as a blending component for gasoline – Determination of water content – Karl Fischer potentiometric titration method

This preview is downloaded from www.sis.se. Buy the entireThis preview is downloaded from www.sis.se. Buy the entireThis preview is downloaded from www.sis.se. Buy the entireThis preview is downloaded from www.sis.se. Buy the entirestandard via https://www.sis.se/std-80030701standard via https://www.sis.se/std-80030701standard via https://www.sis.se/std-80030701standard via https://www.sis.se/std-80030701

Fastställd: 2021-08-10ICS: 71.080.60;75.160.20

© Copyright / Upphovsrätten till denna produkt tillhör Svenska institutet för standarder, Stockholm, Sverige. Upphovsrätten och användningen av denna produkt regleras i slutanvändarlicensen som återfinns på sis.se / slutanvandarlicens och som du automatiskt blir bunden av när du använder produkten. För ordlista och förkortningar se sis.se / ordlista.

© Copyright Svenska institutet för standarder, Stockholm, Sweden. All rights reserved. The copyright and use of this product is governed by the end-user licence agreement which you automatically will be bound to when using the product. You will find the licence at sis.se / enduserlicenseagreement.

Upplysningar om sakinnehållet i standarden lämnas av Svenska institutet för standarder, telefon 08 - 555 520 00. Standarder kan beställas hos SIS som även lämnar allmänna upplysningar om svensk och utländsk standard.

Standarden är framtagen av kommittén för Provning av flytande och gasformiga bränslen, SIS / TK 413.

Har du synpunkter på innehållet i den här standarden, vill du delta i ett kommande revideringsarbete eller vara med och ta fram andra standarder inom området? Gå in på www.sis.se - där hittar du mer information.

Den här standarden kan hjälpa dig att effektivisera och kvalitetssäkra ditt arbete. SIS har fler tjänster att erbjuda dig för att underlätta tillämpningen av standarder i din verksamhet.

SIS AbonnemangSnabb och enkel åtkomst till gällande standard med SIS Abonnemang, en prenumerationstjänst genom vilken din orga-nisation får tillgång till all världens standarder, senaste uppdateringarna och där hela din organisation kan ta del av innehållet i prenumerationen.

Utbildning, event och publikationerVi erbjuder även utbildningar, rådgivning och event kring våra mest sålda standarder och frågor kopplade till utveckling av standarder. Vi ger också ut handböcker som underlättar ditt arbete med att använda en specifik standard.

Vill du delta i ett standardiseringsprojekt?Genom att delta som expert i någon av SIS 300 tekniska kommittéer inom CEN (europeisk standardisering) och / eller ISO (internationell standardisering) har du möjlighet att påverka standardiseringsarbetet i frågor som är viktiga för din organisation. Välkommen att kontakta SIS för att få veta mer!

KontaktSkriv till kundservice@sis.se, besök sis.se eller ring 08 - 555 523 10

This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80030701

Europastandarden EN 15692:2021 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN 15692:2021.

Denna standard ersätter SS-EN 15692:2009, utgåva 1.

The European Standard EN 15692:2021 has the status of a Swedish Standard. This document contains the official version of EN 15692:2021.

This standard supersedes the SS-EN 15692:2009, edition 1.

This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80030701

LÄSANVISNINGAR FÖR STANDARDER

I dessa anvisningar behandlas huvudprinciperna för hur regler och yttre begränsningar anges i standardiseringsprodukter.

KravEtt krav är ett uttryck i ett dokuments innehåll som anger objektivt verifierbara kriterier som ska uppfyllas och från vilka ingen avvikelse tillåts om efterlevnad av dokumentet ska kunna åberopas.Krav uttrycks med hjälpverbet ska (eller ska inte för förbud).

RekommendationEn rekommendation är ett uttryck i ett dokuments innehåll som anger en valmöjlighet eller ett tillvägagångssätt som bedöms vara särskilt lämpligt utan att nödvändigtvis nämna eller utesluta andra. Rekommendationer uttrycks med hjälpverbet bör (eller bör inte för avrådanden).

InstruktionInstruktioner anges i imperativ form och används för att ange hur något görs eller utförs. De kan underordnas en annan regel, såsom ett krav eller en rekommendation. De kan även användas självständigt, och är då att betrakta som krav.

FörklaringEn förklaring är ett uttryck i ett dokuments innehåll som förmedlar information. En förklaring kan uttrycka tillåtelse, möjlighet eller förmåga. Tillåtelse uttrycks med hjälpverbet får. Inom standardiseringen saknas rekommenderad nekande motsats till hjälpverbet får, förbud uttrycks med ska inte enligt reglerna för krav. Möjlighet och förmåga uttrycks med hjälpverbet kan (eller motsatsen kan inte).

READING INSTRUCTIONS FOR STANDARDS

These instructions cover the main principles for the use of provisions and external constraints in standardization deliverables.

RequirementA requirement is an expression, in the content of a document, that conveys objectively verifiable criteria to be fulfilled, and from which no deviation is permitted if conformance with the document is to be claimed. Requirements are expressed by the auxiliary shall (or shall not for prohibition).

RecommendationA recommendation is an expression, in the content of a document, that conveys a suggested possible choice or course of action deemed to be particularly suitable, without necessarily mentioning or excluding others. Recommendations are expressed by the auxiliary should (or should not for dissuasion).

InstructionAn instruction is expressed in the imperative mood and is used in order to convey an action to be performed. It can be subordinated to another provision, such as a requirement or a recommendation. It can also be used independently and is then to be regarded as a requirement.

StatementA statement is an expression, in the content of a document, that conveys information. A statement can express permission, possibility or capability. Permission is expressed by the auxiliary may. There is no recommended opposite expression for the auxiliary may in standardization, prohibition is expressed by the use of shall not in accordance with the rules for requirements. Possibility and capability are expressed by the auxiliary can (its opposite being cannot).

This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80030701

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM

EN 15692 July 2021

ICS 75.160.20 Supersedes EN 15692:2009English Version Ethanol as a blending component for gasoline - Determination of water content - Karl Fischer potentiometric titration method Ethanol comme base de mélange à l'essence - Détermination de la teneur en eau - Méthode de Karl Fischer par titrage potentiométrique Ethanol zur Verwendung als Blendkomponente in Ottokraftstoff - Bestimmung des Wassergehaltes - Potentiometrische Titration nach Karl Fischer

This European Standard was approved by CEN on 14 June 2021. 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 C O M I T É E U R O P É E N D E N O R M A L I S A T I O N E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15692:2021 E

SS-EN 15692:2021 (E)

This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80030701

2

Contents Page

European foreword ............................................................................................................................................ 3

1 Scope .......................................................................................................................................................... 4

2 Normative references .......................................................................................................................... 4

3 Terms and definitions ......................................................................................................................... 4

4 Principle ................................................................................................................................................... 4

5 Reagents and materials ...................................................................................................................... 5

6 Apparatus ................................................................................................................................................ 5

7 Sampling and sample handling ........................................................................................................ 6

8 Procedure ................................................................................................................................................ 6 8.1 Standardization of the Karl Fischer reagent ............................................................................... 6 8.2 Analysis .................................................................................................................................................... 7

9 Calculation ............................................................................................................................................... 8

10 Expression of results ........................................................................................................................... 8

11 Precision .................................................................................................................................................. 8 11.1 General...................................................................................................................................................... 8 11.2 Repeatability, r ...................................................................................................................................... 8 11.3 Reproducibility, R ................................................................................................................................. 8

12 Test report ............................................................................................................................................... 9

Bibliography ....................................................................................................................................................... 10

SS-EN 15692:2021 (E)

This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80030701

3

European foreword

This document (EN 15692:2021) has been prepared by Technical Committee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin”, the secretariat of which is held by NEN.

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 January 2022, and conflicting national standards shall be withdrawn at the latest by January 2022.

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 15692:2009.

In comparison with the previous edition, the following technical modifications have been made:

— The original document was prepared by CEN/TC 19’s Ethanol Task Force under its Working Group 21 and is based on ISO 760 [1]. It is developed as an alternative to EN 15489 [2], delivering a method more widely used in the alcohol and beverage industry environment.

— The test method has been revised in terms of its precision and scope. A second interlaboratory study (ILS) in 2010 [5] confirmed the application to automotive ethanol (E85) fuel. Use of the method over time, especially in proficiency testing programmes, gave questions around whether the precision in the original document. When CEN/TC 19/WG 36 was requested to study the ILS reports, the recalculated precision results did not reflect the published precision.

— The newly calculated precision is lower than the one published and the statistics allow introducing a constant reproducibility for the determination of water content in ethanol. The test method lower limit could remain at 0,05 % (whereas the lowest sample mean was 0,02 %). So the scope range has not been changed, but the precision calculations have.

Any feedback and questions on this document should be directed to the users’ national standards body. A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to 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.

SS-EN 15692:2021 (E)

This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80030701

4

1 Scope

This document specifies a method for the direct determination of water in ethanol to be used as a blending component for petrol, as well as in automotive ethanol (E85) fuel.

This method is applicable in the range 0,05 % (m/m) to 0,54 % (m/m). NOTE For the purposes of this document, the term “% (m/m)” is used to represent the mass fraction.

WARNING — Use of this document might involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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.

EN ISO 3170, Petroleum liquids - Manual sampling (ISO 3170)

EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696)

3 Terms and definitions

For the purposes of this document, the following term and definition apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at https://www.electropedia.org/

• ISO Online browsing platform: available at https://www.iso.org/obp

3.1 water content content of water determined by potentiometric Karl Fischer procedure as given in this document

4 Principle

A weighed test portion is injected into the titration vessel of a potentiometric Karl Fischer apparatus. The water present is titrated to a potentiometric end point using Karl Fischer reagent. Iodine (I2), with presence of anhydride sulfur (SO2), of methanol (CH3OH) and of an appropriate nitrogen base (RN), is introduced for the Karl Fischer reaction. Based on the stoichiometry of the reaction, one mole of iodine reacts with one mole of water.

The reaction can be expressed as follows:

CH3OH + SO2 + RN → [RNH]SO3CH3

H2O +I2 + [RNH]SO3CH3 + 2RN → [RNH]SO4CH3+2[RNH]I

SS-EN 15692:2021 (E)

This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80030701