EN 15721:2013
(Main)Ethanol as a blending component for petrol - Determination of higher alcohols, methanol and other impurities - Gas chromatographic method
Ethanol as a blending component for petrol - Determination of higher alcohols, methanol and other impurities - Gas chromatographic method
This European Standard specifies a gas chromatographic method for ethanol, in which higher alcohols (propan-1-ol, butan-1-ol, butan-2-ol, 2-methylpropan-1-ol (isobutanol), 2 methylbutan 1 ol, and 3 methylbutan 1 ol) from 0,1 % up to 2,5 % (m/m), methanol from 0,1 % up to 3 % (m/m) and other impurities, in the range from 0,1 % up to 2 % (m/m) are determined.
Impurities are all the compounds not attributed to the groups of higher alcohols or methanol.
Due to possible interferences, the method is not applicable to denatured ethanol samples.
Water, if present in the sample, is not included in this analysis, because a signal for water is not visible in the chromatogram. Therefore, if "alcohol content" is called up in a specification, water needs to be considered separately in the calculations.
NOTE For the purposes of this European Standard, the term “% (m/m)” is used to represent the mass fraction (ω).
Ethanol zur Verwendung als Blendkomponente in Ottokraftstoff - Bestimmung von höheren Alkoholen, Methanol und anderen Verunreinigungen - Gaschromatographisches Verfahren
Diese Europäische Norm legt ein gaschromatographisches Verfahren für Ethanol fest, mit dem höhere Alkohole (Propan 1 ol, Butan 1 ol, Butan 2 ol, 2 Methylpropan-1 ol (Isobutanol), 2 Methylbutan-1 ol und 3 Methylbutan 1 ol) von 0,1 % (m/m) bis 2,5 % (m/m), Methanol von 0,1 % (m/m) bis 3 % (m/m) und andere Verunreinigungen im Konzentrationsbereich von 0,1 % (m/m) bis 2 % (m/m) bestimmt werden.
Verunreinigungen sind alle Verbindungen, welche nicht der Gruppe der höheren Alkohole oder Methanol zugeordnet werden.
ANMERKUNG 1 In der Europäischen Spezifikation (EN 15376) für Ethanol für den Gebrauch als Blendkomponente ist der Grenzwert für den Ethanolgehalt definiert mit Einbezug des Gehalts an höheren Alkoholen definiert. Der Grenzwert beinhaltet also nicht nur den Ethanolgehalt allein.
Das Verfahren ist auf Grund möglicher Störungen nicht für Proben denaturierten (vergällten) Ethanols anwendbar.
Gegebenenfalls in der Probe vorliegendes Wasser wird bei der Analyse nicht berücksichtigt, da das Signal für Wasser im Chromatogramm nicht sichtbar ist. Deswegen muss zur gegebenenfalls erforderlichen Angabe des Alkoholgehalts in einer Anforderungsnorm das Wasser getrennt bestimmt und berücksichtigt werden.
ANMERKUNG 2 Für die Zwecke dieser Europäischen Norm wird zur Angabe des Massenanteils einer Substanz ω der Ausdruck „% (m/m)“ verwendet.
Éthanol comme base de mélange à l'essence - Détermination de la teneur en alcools supérieurs, méthanol et autres impuretés - Méthode par chromatographie en phase gazeuse
La présente Norme européenne prescrit une méthode de chromatographie en phase gazeuse applicable à l'éthanol, pour la détermination de la teneur en alcools supérieurs (propan-1-ol, butan-1-ol, butan-2-ol, 2-méthyl propan-1-ol (isobutanol), 2-méthyl butan-1-ol, et 3-méthyl butan-1-ol) de 0,1 à 2,5 % (m/m), de la teneur en méthanol de 0,1 à 3 % (m/m) et de la teneur en autres impuretés de 0,1 à 2 % (m/m).
Les impuretés sont constituées de tous les composés dont les pics ne sont attribués ni au méthanol ni au groupe des alcools supérieurs.
NOTE 1 La Norme de spécification européenne de l’éthanol comme base de mélange fixe une exigence sur la teneur combinée (éthanol + alcools supérieurs) et non sur la teneur en éthanol uniquement.
En raison d’éventuelles interférences, la méthode n'est pas applicable aux échantillons d'éthanol dénaturé.
L'eau, si l'échantillon en contient, n'est pas comprise dans l'analyse car elle ne donne pas de signal visible sur le chromatogramme. Par conséquent, si la "teneur en alcools" est évoquée dans les spécifications, le cas de l'eau nécessitera d’être considéré séparément pour les calculs.
NOTE 2 Pour les besoins de la présente Norme européenne, l’expression « % (m/m) » est utilisée pour désigner la fraction massique (ω).
Etanol kot komponenta za dodajanje motornemu bencinu - Določevanje višjih alkoholov, metanola ter hlapnih nečistoč - Metoda plinske kromatografije
Ta evropski standard določa metodo plinske kromatografije za etanol, s katero se določajo višji alkoholi (propan-1-ol, butan-1-ol, butan-2-ol, 2-metilpropan-1-ol (izobutanol), 2-metilbutan-1-ol in 3-metilbutan-1-ol) od 0,1 % do 2,5 % (m/m), metanol od 0,1 % do 3 % (m/m) in druge nečistoče v razponu od 0,1 % do 2 % (m/m). Nečistoče so vse spojine, ki se ne pripisujejo skupinam višjih alkoholov ali metanolu. Zaradi morebitnih motenj se metoda ne uporablja za vzorce denaturiranega etanola. Če je v vzorcu prisotna voda, ni vključena v to analizo, ker signal za vodo ni viden v kromatogramu. Če se v specifikaciji navaja »vsebnost alkohola«, je treba vodo v izračunih upoštevati ločeno.
General Information
- Status
- Published
- Publication Date
- 27-Aug-2013
- Withdrawal Date
- 27-Feb-2014
- Technical Committee
- CEN/TC 19 - Petroleum products, lubricants and related products
- Drafting Committee
- CEN/TC 19/WG 9 - Chromatographic test methods
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 04-Jul-2024
- Completion Date
- 14-Apr-2025
Relations
- Effective Date
- 12-Apr-2010
- Effective Date
- 19-Mar-2025
Overview
EN 15721:2013 (CEN) specifies a gas chromatographic (GC) method for analysing ethanol intended as a blending component for petrol. The standard covers determination of higher alcohols, methanol and other volatile impurities in ethanol by direct GC analysis with a flame ionisation detector (GC‑FID). Target concentration ranges are:
- Higher alcohols (propan‑1‑ol, butan‑1‑ol, butan‑2‑ol, 2‑methylpropan‑1‑ol / isobutanol, 2‑methylbutan‑1‑ol, 3‑methylbutan‑1‑ol): 0.1 % to 2.5 % (m/m)
- Methanol: 0.1 % to 3 % (m/m)
- Other impurities (all compounds not in the higher alcohols or methanol groups): 0.1 % to 2 % (m/m)
Note: the method is not applicable to denatured ethanol and water is not detected by the GC; water content must therefore be handled separately in any “alcohol content” calculation.
Key topics and technical requirements
- Analytical principle: direct injection of sample with an internal standard; separation by bonded capillary column with temperature (and optionally flow) programming; detection by FID. Calibration yields response factors used for quantification.
- Two procedures:
- Procedure A - direct injection; pentan‑3‑ol commonly used as internal standard.
- Procedure B - includes a prior water dilution step; 4‑methylpentan‑2‑ol commonly used as internal standard. Both procedures have been validated to give equivalent results.
- Chromatographic resolution: column must achieve a minimum resolution of 1.0 for separation of 2‑methylbutan‑1‑ol and 3‑methylbutan‑1‑ol.
- Sample handling & calibration: gravimetric preparation of calibration solutions, use of high‑purity reagents and glass vials, careful sealing to avoid volatile losses, and traceable weighing (analytical balance).
- Instrumentation: GC with split injector and FID; software or system for chromatogram recording and quantitative calculations.
Applications and users
- Practical use: quality control of ethanol used for petrol blending, batch release testing, regulatory compliance and ingredient screening to ensure conformity with ethanol blending specifications.
- Typical users: fuel laboratories, petrochemical and biofuel producers, analytical service providers, regulatory bodies and standardisation teams involved in petrol blending and fuel quality assurance.
- Keywords: EN 15721:2013, ethanol as a blending component, gas chromatographic method, higher alcohols, methanol, GC‑FID, petrol blending, impurities analysis.
Related standards
- EN 15376 - CEN specification for ethanol blending component (related limits and requirements)
- EN ISO 3170 - Petroleum liquids - Manual sampling (sampling protocol)
- EN ISO 3696 - Water for analytical laboratory use (reagent grade water)
EN 15721:2013 provides a validated, practical GC procedure tailored for ethanol used in automotive fuel blending and supports consistent, traceable impurity analysis across laboratories.
Frequently Asked Questions
EN 15721:2013 is a standard published by the European Committee for Standardization (CEN). Its full title is "Ethanol as a blending component for petrol - Determination of higher alcohols, methanol and other impurities - Gas chromatographic method". This standard covers: This European Standard specifies a gas chromatographic method for ethanol, in which higher alcohols (propan-1-ol, butan-1-ol, butan-2-ol, 2-methylpropan-1-ol (isobutanol), 2 methylbutan 1 ol, and 3 methylbutan 1 ol) from 0,1 % up to 2,5 % (m/m), methanol from 0,1 % up to 3 % (m/m) and other impurities, in the range from 0,1 % up to 2 % (m/m) are determined. Impurities are all the compounds not attributed to the groups of higher alcohols or methanol. Due to possible interferences, the method is not applicable to denatured ethanol samples. Water, if present in the sample, is not included in this analysis, because a signal for water is not visible in the chromatogram. Therefore, if "alcohol content" is called up in a specification, water needs to be considered separately in the calculations. NOTE For the purposes of this European Standard, the term “% (m/m)” is used to represent the mass fraction (ω).
This European Standard specifies a gas chromatographic method for ethanol, in which higher alcohols (propan-1-ol, butan-1-ol, butan-2-ol, 2-methylpropan-1-ol (isobutanol), 2 methylbutan 1 ol, and 3 methylbutan 1 ol) from 0,1 % up to 2,5 % (m/m), methanol from 0,1 % up to 3 % (m/m) and other impurities, in the range from 0,1 % up to 2 % (m/m) are determined. Impurities are all the compounds not attributed to the groups of higher alcohols or methanol. Due to possible interferences, the method is not applicable to denatured ethanol samples. Water, if present in the sample, is not included in this analysis, because a signal for water is not visible in the chromatogram. Therefore, if "alcohol content" is called up in a specification, water needs to be considered separately in the calculations. NOTE For the purposes of this European Standard, the term “% (m/m)” is used to represent the mass fraction (ω).
EN 15721:2013 is classified under the following ICS (International Classification for Standards) categories: 75.160.20 - Liquid fuels. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 15721:2013 has the following relationships with other standards: It is inter standard links to EN 15721:2009, prEN 15721. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 15721:2013 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.JUDILMHEthanol zur Verwendung als Blendkomponente in Ottokraftstoff - Bestimmung von höheren Alkoholen, Methanol und flüchtigen Verunreinigungen - Gaschromatographisches VerfahrenÉthanol comme base de mélange à l'essence - Détermination de la teneur en alcools supérieurs, méthanol et impuretés volatiles - Méthode par chromatographie en phase gazeuseEthanol as a blending component for petrol - Determination of higher alcohols, methanol and volatile impurities - Gas chromatographic method75.160.20Liquid fuels71.080.60Alkoholi. EtriAlcohols. EthersICS:Ta slovenski standard je istoveten z:EN 15721:2013SIST EN 15721:2013en,fr,de01-november-2013SIST EN 15721:2013SLOVENSKI
STANDARDSIST EN 15721:20091DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15721
August 2013 ICS 75.160.20 Supersedes EN 15721:2009English Version
Ethanol as a blending component for petrol - Determination of higher alcohols, methanol and other impurities - Gas chromatographic method
Éthanol comme base de mélange à l'essence - Détermination de la teneur en alcools supérieurs, méthanol et autres impuretés - Méthode par chromatographie en phase gazeuse
Ethanol zur Verwendung als Blendkomponente in Ottokraftstoff - Bestimmung von höheren Alkoholen, Methanol und anderen Verunreinigungen - Gaschromatographisches Verfahren This European Standard was approved by CEN on 12 July 2013.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15721:2013: ESIST EN 15721:2013
Examples of chromatograms . 15 Bibliography . 21
Two procedures ("Procedure A" and "Procedure B") are specified which differ mainly in the optional use of a water dilution step prior to the analysis. Both variants have been validated to produce identical results and precision in extensive RR tests. 4 Reagents and materials All reagents shall be of recognised analytical grade (minimum 99 %) or of higher purity, if commercially available. They shall be stored in closed dark glass bottles and can be used for some long time. Other internal standards may also be used when there is sufficient proof that their GC signal does not interfere with the other signals in the chromatogram. 4.1 Water which, for analytical laboratory use, shall conform to grade 2 of EN ISO 3696. SIST EN 15721:2013
5 Apparatus
5.1 Gas chromatograph, equipped with a Flame Ionisation Detector (FID), a split injector and connected to a PC or other system permitting the recording of chromatograms and execution of quantitative calculations. 5.2 Gas chromatographic column 5.2.1 General Bonded capillary column with a suited phase, permitting the complete separation of all requested compounds for the analysis, except for 2-methylbutan-1-ol and 3-methylbutan-1-ol, for which a minimum peak resolution of 1,0 (see 5.2.2) is required. The internal standard shall be perfectly separated from all other compounds. Additional detail, including sample chromatograms, is given in Annex A. 5.2.2 Chromatographic resolution The column resolution (as measured for 2-methylbutan-1-ol and 3-methylbutan-1-ol) shall be at least 1,0. Determine the column resolution, CR, with the calibration solutions (7.3) or (7.4) for the 2-methylbutan-1-ol and 3-methylbutan-1-ol peaks using the following Formula (1): ()()211269912WWttCR+−=, (1) SIST EN 15721:2013
Key 1 Pentan-3-ol (retention time 12,292 min) X retention time (min) 2 2-methylbutan-1-ol (retention time 13,741 min) Y FID signal 3 3-methylbutan-1-ol (retention time 13,820 min)
Figure 1 — Typical chromatogram for calculation of column resolution 5.3 Analytical balance, capable of weighing to the nearest 0,1 mg. 5.4 Vials, having seals and used for test portions and calibration solutions. 6 Sampling Unless otherwise specified, laboratory samples shall be obtained by the procedures specified in EN ISO 3170. Glass bottles shall be used for taking samples. The glass bottles shall be meticulously cleaned and rinsed at least twice with the product to be sampled. Special care shall be taken during all further manipulations with the samples to avoid any risk of further contamination, e.g. with water. SIST EN 15721:2013
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기사 제목: EN 15721:2013 - 휘발유용 블렌딩 성분으로서의 에탄올 - 고급 알코올, 메탄올 및 기타 불순물의 결정 - 가스 크로마토그래픽 방법 기사 내용: 이 기준은 에탄올에 대한 가스 크로마토그래픽 방법을 명시하고 있다. 이 방법은 0.1%에서 2.5% (m/m)의 범위에서 고급 알코올 (프로판-1-올, 부탄-1-올, 부탄-2-올, 2-메틸프로판-1-올 (이소부탄올), 2-메틸부탄-1-올 및 3-메틸부탄-1-올)과 0.1%에서 3% (m/m)의 범위에서 메탄올, 그리고 0.1%에서 2% (m/m)의 범위에서 기타 불순물을 검출한다. 불순물은 고급 알코올이나 메탄올 그룹에 속하지 않는 모든 화합물을 의미한다. 가능한 간섭물로 인해, 이 방법은 탈액 에탄올 샘플에 적용할 수 없다. 샘플에 존재하는 경우에도 이 분석에는 물이 포함되지 않는다. 이는 크로마토그램에서 물의 신호가 보이지 않기 때문이다. 따라서 "알코올 함량"이라는 용어가 사용되는 경우, 물은 계산에서 별도로 고려되어야 한다. 참고로, 이 기준에서 "% (m/m)"라는 용어는 질량 분율 (ω)을 나타내기 위해 사용된다.
The article explains that there is a gas chromatographic method, specified by EN 15721:2013, for determining the levels of higher alcohols, methanol, and other impurities in ethanol used as a blending component for petrol. This method covers the range of 0.1% to 2.5% for higher alcohols, 0.1% to 3% for methanol, and 0.1% to 2% for other impurities, all expressed as mass fractions (m/m). The method does not apply to denatured ethanol samples due to possible interferences. Water is not included in the analysis, and if the alcohol content is mentioned, water should be calculated separately.
記事のタイトル: EN 15721:2013 - ペトロールのブレンド成分としてのエタノール - 高級アルコール、メタノールおよびその他の不純物の決定 - ガスクロマトグラフィー法 記事の内容: この欧州規格は、エタノールに対するガスクロマトグラフィー法を指定しています。この方法は、高級アルコール（プロパン-1-オール、ブタン-1-オール、ブタン-2-オール、2-メチルプロパン-1-オール（イソブタノール）、2-メチルブタン-1-オール、および3-メチルブタン-1-オール）の0.1％から2.5％（m/m）の範囲、メタノールの0.1％から3％（m/m）の範囲、およびその他の不純物の0.1％から2％（m/m）の範囲を測定します。 不純物とは、高級アルコールまたはメタノールグループに帰属しないすべての化合物を指します。 干渉の可能性があるため、この方法は変性エタノールのサンプルには適用できません。 サンプルに水が含まれている場合でも、この分析には含まれていません。これは、クロマトグラムにおいて水の信号が見えないためです。したがって、「アルコール含有量」という用語が使用される場合、水は別途計算する必要があります。 この欧州規格では、"%（m/m）"という用語は質量分率（ω）を表すために使用されています。
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