Liquid petroleum products - Petrol - Determination of low lead concentrations by atomic absorption spectrometry

This document specifies an atomic absorption spectrometric test method for the determination of the lead content of petrol in the range 2,5 mg/l to 10,0 mg/l. This test method is independent of the lead alkyl type.
NOTE 1   Annex A describes an alternative procedure but with a poorer precision for the determination of the lead content of petrol in the range 3,0 mg/l to 10,0 mg/l. This procedure is also independent of the lead alkyl type.
NOTE 2   For the purposes of this document, the term "% (V/V)" is used to represent the volume fraction.
WARNING - The use of this document 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.

Flüssige Mineralölerzeugnisse - Ottokraftstoff - Bestimmung von niedrigen Bleigehalten durch Atomabsorptionspektrometrie

Dieses Dokument legt ein Verfahren zur Bestimmung des Bleigehaltes von Ottokraftstoffen im Bereich von 2,5 mg/l bis 10,0 mg/l fest. Dieses Verfahren ist von der Art der Bleialkyl-Verbindungen unabhängig.
ANMERKUNG 1   In Anhang A ist ein alternatives Verfahren für die Bestimmung des Bleigehaltes im Bereich von 3,0 mg/l bis 10,0 mg/l, jedoch mit schlechterer Präzision, angegeben. Auch dieses Verfahren ist von der Art der Bleialkyl-Verbindungen unabhängig.
ANMERKUNG 2   Für die Anwendung dieses Dokument wird (% V/V) für Volumenanteile in Prozent verwendet.
WARNUNG - Die Anwendung dieses Dokument kann den Einsatz gefährlicher Stoffe, Arbeitsgänge und Geräte mit sich bringen. Diese Norm gibt nicht vor, alle mit ihren Anwendungen verbundenen Sicherheitsprobleme anzusprechen. Der Anwender dieser Norm ist dafür verantwortlich, vorher angemessene Maßnahmen zu ergreifen und die Anwendbarkeit einschränkender Vorschriften zu ermitteln.

Produits pétroliers liquides - Essence - Détermination des basses teneurs en plomb par spectrométrie d'absorption atomique

Le présent document prescrit une méthode de détermination de la teneur en plomb dans l'essence par spectrométrie d'absorption atomique, dans le domaine de concentration 2,5 mg/l a 10,0 mg/l. Cette méthode d'essai est indépendante du type d'alkyl de plomb.
NOTE 1   L'Annexe A décrit un mode opératoire alternatif pour la détermination de la teneur en plomb dans l'essence dans le domaine de concentration 3,0 mg/l a 10,0 mg/l, mais avec une fidélité moins bonne. Ce mode opératoire alternatif est également indépendant du type d'alkyl de plomb.
NOTE 2   Dans le cadre du présent document, l'expression "% (V/V)" est utilisée pour représenter la fraction volumique d'un matériau.
AVERTISSEMENT - L'utilisation du présent document implique l'intervention de produits, d'opérations et d'équipements a caractere dangereux. La présente Norme européenne n'est pas censée aborder tous les problemes de sécurité concernés par son usage. Il est de la responsabilité de l'utilisateur de consulter et d'établir des regles de sécurité et d'hygiene appropriées et de déterminer l'applicabilité des restrictions réglementaires avant utilisation.

Tekoči naftni proizvodi - Bencin - Določevanje nizkih koncentracij svinca z atomsko absorpcijsko spektrometrijo

General Information

Status
Published
Publication Date
31-Oct-2004
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Nov-2004
Due Date
01-Nov-2004
Completion Date
01-Nov-2004

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flüssige Mineralölerzeugnisse - Ottokraftstoff - Bestimmung von niedrigen Bleigehalten durch AtomabsorptionspektrometrieProduits pétroliers liquides - Essence - Détermination des basses teneurs en plomb par spectrométrie d'absorption atomiqueLiquid petroleum products - Petrol - Determination of low lead concentrations by atomic absorption spectrometry75.160.20Liquid fuelsICS:Ta slovenski standard je istoveten z:EN 237:2004SIST EN 237:2004en01-november-2004SIST EN 237:2004SLOVENSKI
STANDARDSIST EN 237:19981DGRPHãþD



SIST EN 237:2004



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 237September 2004ICS 75.160.20Supersedes EN 237:1996
English versionLiquid petroleum products - Petrol - Determination of low leadconcentrations by atomic absorption spectrometryProduits pétroliers liquides - Essence - Détermination desbasses teneurs en plomb par spectrométrie d'absorptionatomiqueFlüssige Mineralölerzeugnisse - Ottokraftstoff -Bestimmung von niedrigen Bleigehalten durchAtomabsorptionspektrometrieThis European Standard was approved by CEN on 9 July 2004.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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 237:2004: ESIST EN 237:2004



EN 237:2004 (E) 2 Contents page Foreword.3 1 Scope.4 2 Normative references.4 3 Principle.4 4 Reagents and materials.5 5 Apparatus.6 6 Sampling.6 7 Procedure.6 7.1 General preparation.6 7.2 Preparation of calibration solutions (0,25 mg/l, 0,50 mg/l, 0,75 mg/l, and 1,0 mg/l of lead).6 7.3 Preparation of the test solution.7 7.4 Preparation of instrument.7 7.5 Determination.7 8 Calculation.7 9 Expression of results.8 10 Precision.8 10.1 General background.8 10.2 Repeatability, r.8 10.3 Reproducibility, R.8 11 Test report.8 Annex A (informative)
Alternative procedure.9
SIST EN 237:2004



EN 237:2004 (E) 3 Foreword This document (EN 237:2004) has been prepared by Technical Committee CEN/TC 19 “Petroleum products, lubricants and related products”, 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 March 2005, and conflicting national standards shall be withdrawn at the latest by March 2004. This document supersedes
EN 237:1996. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 237:2004



EN 237:2004 (E) 4 1 Scope This document specifies an atomic absorption spectrometric test method for the determination of the lead content of petrol in the range 2,5 mg/l to 10,0 mg/l. This test method is independent of the lead alkyl type. NOTE 1 Annex A describes an alternative procedure but with a poorer precision for the determination of the lead content of petrol in the range 3,0 mg/l to 10,0 mg/l. This procedure is also independent of the lead alkyl type. NOTE 2 For the purposes of this document, the term “% (V/V)” is used to represent the volume fraction. WARNING – The use of this document 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 1042, Laboratory glassware – One-mark volumetric flasks (ISO 1042:1998). EN ISO 3170, Petroleum liquids - Manual sampling (ISO 3170:2004). EN ISO 3171, Petroleum liquids - Automatic pipeline sampling (ISO 3171:1988). ISO 385-1, Laboratory glassware - Burettes - Part 1: General requirements. ISO 648, Laboratory glassware – One-mark pipettes. 3 Principle The sample, diluted to the tenth (V/V) with methyl isobutyl ketone and treated with iodine, is aspirated into the air/acetylene flame of an atomic absorption spectrometer. The absorbance is measured at a wavelength of 217,0 nm and is compared with that of calibration solutions of known lead concentrations. NOTE Annex A describes an alternative procedure, but with a poorer precision, that may be used when the spectrometer is not stable enough in the wavelength region of 217,0 nm to obtain correct results according to the above. SIST EN 237:2004



EN 237:2004 (E) 5 4 Reagents and materials Use only reagents of recognised analytical grade. 4.1 Air, oil free, under pressure in a steel cylinder, or compressed air. 4.2 Acetylene, under pressure in a steel cylinder. WARNING – Compressed gases shall be stored outside the laboratory. 4.3 Toluene 4.4 2,2,4-Trimethylpentane (iso-octane) 4.5 Methyl isobutyl ketone (MIBK) 4.6 50 %/50 % (V/V) mixture of toluene and iso-octane 4.7 Aliquat 336 (tricapryl methyl ammonium chloride) 4.8 10 % (V/V) Aliquat 336/MIBK Solution Dissolve 100 ml (88,0 g ± 0,1 g) of Aliquat 336 with MIBK and make up to 1 l. 4.9 1 % (V/V) Aliquat 336/MIBK Solution Dissolve 10 ml (8,80 g ± 0,05 g) of Aliquat 336 with MIBK and make up to 1 l. 4.10 Iodine solution. Dissolve 3,0 g ± 0,1 g of iodine crystals with toluene and make up to 100 ml. 4.11 Lead chloride (PbCl2), of 99 % mass purity grade. 4.12 Concentrated lead standard stock solution, c(Pb) = 1 000 mg/l. Dissolve 335,6 mg of lead chloride (4.11) previously dried at about 105 °C for at least 3 h in about 200 ml of 10 % Aliquat 336/MIBK solution (4.8) in a 250 ml volumetric flask (5.4). Dilute to the mark with the 10 % Aliquat solution, mix, and store in a brown bottle having a polyethylene-lined cap. This solution contains 1 000 mg/l of lead. NOTE 1 The concentrated lead standard stock solution is stable for at least 6 months. NOTE 2 Smaller volumes may be prepared, e.g. 100 ml, however the precision statement as given in clause 10 has been established using 250 ml volumetric flasks. 4.13 Diluted lead standard stock solution, c(Pb) = 100 mg/l. Using a pipette (5.5), transfer accurately 25,0 ml of the concentrated lead standard stock solution (4.12) into a 250 ml volumetric flask (5.4), and dilute to the mark with the 1 % Aliquat 336/MIBK solution (4.9). Store in a brown bottle having a polyethylene-lined cap. This solution contains 100 mg/l of lead. NOTE Smaller volumes may be prepared, e.g. 100 ml, however the precision statement as g
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