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

This European standard describes a direct determination method for the water content of ethanol, in the range of 0,015% (m/m) to 0,5% (m/m) using potentiometric Karl Fisher techniques.

Ethanol zu Verwendung als Blendkomponente in Ottokraftstoff - Bestimmung des Wassergehaltes - Potentiometrische Titration nach Karl Fischer

Diese Europäische Norm legt ein Verfahren zur direkten Bestimmung des Wassergehaltes in Ethanol fest, das
als Blendkomponente in Ottokraftstoff benutzt wird. Sie ist anwendbar im Bereich von 0,05 % (m/m) bis
0,54 % (m/m).
ANMERKUNG Für die Zwecke dieses Dokuments wird zur Angabe des Massenanteils einer Substanz der Ausdruck
„% (m/m)“ verwendet.
WARNUNG — Die Anwendung dieser Norm kann den Einsatz gefährlicher Stoffe, Arbeitsgänge und
Geräte mit sich bringen. Diese Norm gibt nicht vor, alle mit ihrer Anwendung verbundenen
Sicherheitsprobleme anzusprechen. Der Anwender dieser Norm ist dafür verantwortlich, vorher
geeignete Sicherheits- und Arbeitsschutzmaßnahmen festzulegen und die Anwendbarkeit
einschränkender Vorschriften zu ermitteln.

Ethanol pour essence au plomb - Détermination de la teneur de l'eau - Méthode de Karl Fischer titrage par potentiométrie

La présente Norme européenne prescrit une méthode de détermination directe de la teneur en eau dans
l’éthanol utilisé comme constituant d’essence pour automobiles. Elle s’applique aux échantillons d’éthanol
dont la teneur en eau est comprise entre 0,05 % (m/m) et 0,54 % (m/m).
NOTE Pour les besoins du présent document, le terme «% (m/m)» représente la fraction massique.
AVERTISSEMENT — L'utilisation de la présente Norme européenne peut impliquer l'intervention de
produits, d'opérations et d'équipements à caractère dangereux. La présente Norme européenne n'est
pas censée aborder tous les problèmes de sécurité concernés par son usage. Il est de la
responsabilité de l'utilisateur de consulter et d'établir des règles de sécurité et d'hygiène appropriées
et de déterminer l'applicabilité des restrictions réglementaires avant utilisation.

Etanol kot komponenta za dodajanje motornemu bencinu - Določevanje vode - Karl Fischerjeva metoda potenciometrične titracije

General Information

Status
Withdrawn
Public Enquiry End Date
02-Dec-2007
Publication Date
09-Jun-2009
Withdrawal Date
15-Aug-2021
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
05-Aug-2021
Due Date
28-Aug-2021
Completion Date
16-Aug-2021

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Ethanol zu Verwendung als Blendkomponente in Ottokraftstoff - Bestimmung des Wassergehaltes - Potentiometrische Titration nach Karl FischerEthanol pour essence au plomb - Détermination de la teneur de l'eau - Méthode de Karl Fischer titrage par potentiométrieEthanol as a blending component for gasoline - Determination of water content - Karl Fischer potentiometric titration method75.160.20Liquid fuels71.080.60Alkoholi. EtriAlcohols. EthersICS:Ta slovenski standard je istoveten z:EN 15692:2009SIST EN 15692:2009en,fr,de01-julij-2009SIST EN 15692:2009SLOVENSKI

STANDARD
SIST EN 15692:2009

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15692April 2009ICS 75.160.20 English VersionEthanol as a blending component for petrol - Determination ofwater content - Karl Fischer potentiometric titration methodEthanol comme base de mélange à l'essence -Détermination de la teneur en eau - Méthode de titragepotentiométrique Karl FischerEthanol zu Verwendung als Blendkomponente inOttokraftstoff - Bestimmung des Wassergehaltes -Potentiometrische Titration nach Karl FischerThis European Standard was approved by CEN on 19 March 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:

Avenue Marnix 17,

B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15692:2009: ESIST EN 15692:2009

EN 15692:2009 (E) 2 Contents Page Foreword ..............................................................................................................................................................3 1 Scope ......................................................................................................................................................4 2 Normative references ............................................................................................................................4 3 Terms and definitions ...........................................................................................................................4 4 Principle ..................................................................................................................................................4 5 Reagents and materials ........................................................................................................................4 6 Apparatus ...............................................................................................................................................5 7 Sampling and sample handling ............................................................................................................5 8 Procedure ...............................................................................................................................................6 8.1 Standardization of the Karl Fischer reagent .......................................................................................6 8.2 Analysis ..................................................................................................................................................6 9 Calculation ..............................................................................................................................................7 10 Expression of results ............................................................................................................................7 11 Precision .................................................................................................................................................7 11.1 General ....................................................................................................................................................7 11.2 Repeatability, r .......................................................................................................................................8 11.3 Reproducibility, R ..................................................................................................................................8 12 Test report ..............................................................................................................................................8 Bibliography ........................................................................................................................................................9

SIST EN 15692:2009

EN 15692:2009 (E) 3 Foreword This document (EN 15692:2009) 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 October 2009, and conflicting national standards shall be withdrawn at the latest by October 2009. 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 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. 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, 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. SIST EN 15692:2009

EN 15692:2009 (E) 4 1 Scope This European standard specifies a method for the direct determination of water in ethanol to be used in gasoline blends. It is applicable in the range 0,05 % (m/m) to 0,54 % (m/m). NOTE For the purposes of this European Standard, the term “% (m/m)” is used to represent the mass fraction. WARNING — Use of this standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 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 ISO 3170, Petroleum liquids – Manual sampling (ISO 3170:2004) EN ISO 3696, Water for analytical laboratory use – Specification and test methods (ISO 3696:1987) 3 Terms and definitions For the purposes of this European Standard, the following term and definition applies. 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 5 Reagents and materials Use only chemicals and reagents of recognized analytical grade. 5.1 Karl Fischer reagent, pyridine-free Karl Fischer reagent, containing iodine, sulfur dioxide and a odourless amine and with a nominal water equivalent content of either 2 mg or 5 mg water per ml equivalent. The Karl Fisher reagent shall be standardized daily before use (see 8.1). SIST EN 15692:2009

EN 15692:2009 (E) 5 5.2 Titration solvent methanol, anhydrous methanol with
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