EN 27941:1993

Commercial propane and butane - Analysis by gas chromatography (ISO 7941:1988)

The method specified applies to the quantitative determination of hydrocarbons in liquefied petroleum gas, excluding components whose concentrations are below O,1 % (m/m). It is applicable to the analysis of propane, butane and their commercial mixtures which may include saturated and unsaturated C2, C3, C4 and C5 hydrocarbons. It does not apply to "on-line" chromatography.

Handelsübliches Propan und Butan - Gaschromatographische Analyse (ISO 7941:1988)

Diese Internationale Norm beschreibt ein gaschromatographisches Verfahren zur quantitativen Bestimmung von Kohlenwasserstoffen in Flüssiggas (LPG) mit Ausnahme der Komponenten, deren Massenanteile kleiner als 0,1 % sind. Sie ist anwendbar auf die Analyse von Propan, Butan und deren handelsüblichen Gemischen , die gesättigte und ungesättigte C2-, C3-, C4- und C5-Kohlen- wasserstoffe enthalten können. Sie ist nicht anwendbar auf "on-line" Chromatographie.

Propanes et butanes commerciaux - Analyse par chromatographie en phase gazeuse (ISO 7941:1988)

La présente Norme internationale spécifie une méthode de dosage par chromatographie en phase gazeuse des hydrocarbures présents dans les gaz de pétrole liquéfiés (GPL), à l'exclusion des constituants dont la teneur est inférieure à 0,1 % (m/m). Elle s'applique au propane, au butane et à leurs mélanges commerciaux qui peuvent contenir des hydrocarbures en C2, C3, C4 et C5, saturés ou non. Elle ne s'applique pas en chromatographie en continu.

Komercialni propan in butan - Analiza s plinsko kromatografijo (ISO 7941:1988)

General Information

• Status: Published
• Publication Date: 28-Oct-1993
• ICS: 75.160.30 - Gaseous fuels
• Technical Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Drafting Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 27-May-2010
• Completion Date: 27-May-2010
• Ref Project: SIST EN 27941:1998 - Commercial propane and butane - Analysis by gas chromatography (ISO 7941:1988)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Komercialni propan in butan - Analiza s plinsko kromatografijo (ISO 7941:1988)Handelsübliches Propan und Butan - Gaschromatographische Analyse (ISO 7941:1988)Propanes et butanes commerciaux - Analyse par chromatographie en phase gazeuse (ISO 7941:1988)Commercial propane and butane - Analysis by gas chromatography (ISO 7941:1988)75.160.30Plinska gorivaGaseous fuelsICS:Ta slovenski standard je istoveten z:EN 27941:1993SIST EN 27941:1998en01-maj-1998SIST EN 27941:1998SLOVENSKI
STANDARD



SIST EN 27941:1998



SIST EN 27941:1998



SIST EN 27941:1998



INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXaYHAPOAHAR OPrAHM3A4MR fl0 CTAH~APTM3A~MM Commercial propane and butane - Analysis by gas chromatography Propanes et butanes commerciaux - Analyse par Chromatographie en phase gazeuse ISO 7941 First edition 1988-08-01 Reference number ISO 7941 : 1988 (E) SIST EN 27941:1998



ISO7941 : 1988 (El 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. Esch 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, govern- mental 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 7941 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubrican ts. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. 0 International Organization for Standardization, 1988 l Printed in Switzerland SIST EN 27941:1998



INTERNbtTlONAL STANDARD ISO 7941 : 1988 (E) Commercial propane and butane - Analysis by gas chromatography WARNING : Safety precautions - When testing LPG it is essential to observe suitable safety precautions and any regula- tions applicable to installations, apparatus and storage. Particular attention shall be given to the following. a) LPG tan Cause serious burns from the cold, and the liquid should not be allowed to contact the skin. When sampling LPG, goggles and gloves must be worn. b) Discharge of LPG tan give rise to static electricity and it is essential to connect Containers to “earth” Prior to and during discharge. If hydrogen is used as a carrier gas, special safety precautions shall be taken. More particularly, the hydrogen line shall be carefully tested for leaks, especially in the oven. 1 Scope and field of application This International Standard specifies a gas chromatographic method for the quantitative determination of hydrocarbons in liquefied Petroleum gas (LPG), excluding components whose concentrations are below 0,l % (mlm). lt is applicable to the analysis of propane, butane and their commercial mixtures, which may include saturated and unsaturated C2, Cs, C4 and C5 hydrocarbons. lt does not apply to “on-line” chroma- tography. 2 References ISO 565, Test sieves - Woven metal wire clo th, perforated plate and electroformed sheet - Nominal sizes of openings. ISO 4257, Liquefied Petroleum gases - Method of sampling. l) 3 Principle Physical Separation by gas chromatography. Identification of the components by passing a Standard reference mixture or pure hydrocarbons through the column, or by comparison with relative retention volumes of typical chromatograms. Calcula- tion of concentrations of components by measuring peak areas and applying correction factors. 4 Definitions 4.1 correction factor : A factor applied to account for the fact that equal amounts of different components produce unequal Signals in the detector. 1) To be published. 4.2 peak: The Portion of the chromatogram recording the detector response while a component is eluted from the column. 4.2.1 peak area: The area bounded by the peak and the baseline. 4.2.2 peak height : The distance between the peak maximum and the baseline. 4.2.3 peak width: The Segment of the baseline intercepted by the tangents drawn at the inflection Point of each side of the peak. The peak width at half height is the Segment of a line drawn parallel to the baseline at half the peak height which is intercepted by the peak sides. If the baseline is seen
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