SIST EN 15485:2007

Ethanol as a blending component for petrol - Determination of sulfur content - Wavelength dispersive X-ray fluorescence spectrometric method

This document specifies a wavelength-dispersive X-ray fluorescence (WDXRF) test method for the determination of the sulfur content of ethanol from 7 mg/kg to 20 mg/kg.
NOTE   For the purposes of this European Standard, the term "% (m/m)" is used to represent the mass fraction of a material.

Ethanol zur Verwendung als Blendkomponente in Ottokraftstoff - Bestimmung des Schwefelgehaltes - Wellenlängendispersive Röntgenfluoreszenz-Spektrometrie (wdRFA)

Diese Norm gilt für die Bestimmung des Schwefelgehaltes in Ethanol mit Hilfe er wellenlängendispersiven Röntgenfluoreszenz-Analyse (wdRFA) im Bereich von 7 mg/kg bis 20 mg/kg.
ANMERKUNG   Für die Zwecke der vorliegenden Internationalen Norm ist unter "% (m/m)" der Massenanteil in Prozent einer Substanz zu verstehen.

Éthanol comme base de mélange a l'essence - Dosage du soufre - Méthode de fluorescence de rayon X dispersive en longueur d'onde

Le présent document prescrit une méthode d’essai par fluorescence de rayons X dispersive en longueur d’onde
(FXDLO) pour le dosage du soufre dans l’éthanol pour des teneurs comprises entre 7 mg/kg et 20 mg/kg.
NOTE Pour les besoins de la présente Norme européenne l’expression "% (m/m)" est utilisée pour désigner la fraction
massique d'un produit.

Etanol kot komponenta za dodajanje motornemu bencinu – Določevanje vsebnosti žvepla – Metoda z valovno-disperzno rentgensko fluorescenčno spektrometrijo

General Information

• Status: Published
• Publication Date: 24-Oct-2007
• ICS: 71.080.60 - Alcohols. Ethers
• ICS: 75.160.20 - Liquid fuels
• Technical Committee: NAD - Petroleum products, lubricants and related products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Oct-2007
• Due Date: 09-Dec-2007
• Completion Date: 25-Oct-2007
• Directive: 98/70/EC - Quality of petrol and diesel fuels (Dir. 93/12/EEC amendment)
• Mandate: M/344 - Mandate to CEN on Ethanol as an oxygen extender to gasoline
• Ref Project: EN 15485:2007 - Ethanol as a blending component for petrol - Determination of sulfur content - Wavelength dispersive X-ray fluorescence spectrometric method

Overview

EN 15485:2007 (CEN) specifies a wavelength-dispersive X‑ray fluorescence (WDXRF) test method for the determination of sulfur content in ethanol used as a blending component for petrol. The method covers the measuring range 7 mg/kg to 20 mg/kg sulfur and defines required reagents, instrumentation, calibration, sample preparation and reporting. Results are reported to the nearest 0.1 mg/kg.

Key Topics

• Analytical principle: Measure S‑Kα X‑ray fluorescence and background counts using a WDXRF spectrometer and derive sulfur content from a linear calibration curve.
• Measurement range: 7–20 mg/kg sulfur (mg/kg = mass fraction).
• Reagents and standards: Blank ethanol (≥99 %, sulfur <1 mg/kg); calibration substances such as dibutylsulfide or dibutyldisulfide; calibration solutions at 0, 5, 10, 20 mg/kg.
• Instrumentation requirements: WDXRF with S‑Kα detection; recommended anode materials (Rh, Sc or Cr); minimum 30 kV and 50 mA (recommend 30 kV/100 mA); analysing crystals (Ge, pentaerythrite or graphite); helium optical path; polyester sample window (≤4 µm); proportional counter with pulse‑height analyser.
• Calibration & optimization: Linear regression of net count rate vs. sulfur concentration; optimize counting time (example target ~15 000 net counts for 20 mg/kg) and perform daily performance checks.
• Sampling & handling: Use EN ISO 3170 sampling procedures, high density polyethylene containers, avoid contamination (e.g., from phosphorus detergents), and analyse samples promptly to prevent sulfur loss. Calibration solutions should be used the same day.
• Precision: Repeatability and reproducibility are given by statistical models (r = 0.04X + 1.82; R = 0.07X + 3.26, where X is result in mg/kg).

Applications

• Quality control in fuel laboratories and refineries verifying ethanol sulfur content prior to blending with petrol.
• Regulatory compliance testing where maximum sulfur limits for fuel blending components are specified.
• Routine monitoring by independent fuel testing services, biofuel producers, and national standards bodies.
• Method selection for laboratories implementing WDXRF sulfur determination for volatile oxygenates like ethanol.

Who should use this standard

• Fuel testing laboratories and technicians
• Refinery quality assurance teams
• Ethanol and biofuel producers
• Regulatory bodies and conformity assessment labs

Related Standards

• EN ISO 20884:2004 - WDXRF sulfur determination for automotive fuels (method basis)
• EN ISO 3170:2004 - Petroleum liquids - Manual sampling
• EN ISO 4259:2006 - Precision data for test methods

Keywords: EN 15485:2007, ethanol sulfur determination, WDXRF, wavelength-dispersive X‑ray fluorescence, ethanol blending component, petrol, fuel quality control, sulfur content 7–20 mg/kg.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Ethanol as a blending component for petrol - Determination of sulfur content - Wavelength dispersive X-ray fluorescence spectrometric methodMHHQþQRVSHNWURPHWULMRÉthanol comme base de mélange a l'essence - Dosage du soufre - Méthode de fluorescence de rayon X dispersive en longueur d'ondeEthanol zur Verwendung als Blendkomponente in Ottokraftstoff - Bestimmung des Schwefelgehaltes - Wellenlängendispersive Röntgenfluoreszenz-Spektrometrie (wdRFA)Ta slovenski standard je istoveten z:EN 15485:2007SIST EN 15485:2007en75.160.20Liquid fuels71.080.60Alkoholi. EtriAlcohols. EthersICS:SLOVENSKI
STANDARDSIST EN 15485:200701-december-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15485August 2007ICS 71.080.60 English VersionEthanol as a blending component for petrol - Determination ofsulfur content - Wavelength dispersive X-ray fluorescencespectrometric methodÉthanol comme base de mélange à l'essence - Dosage dusoufre - Méthode par fluorescence X dispersive en longueurd'ondeEthanol zur Verwendung als Blendkomponente inOttokraftstoff - Bestimmung des Schwefelgehaltes -Wellenlängendispersive Röntgenfluoreszenz-Spektrometrie(wdRFA)This European Standard was approved by CEN on 30 June 2007.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: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15485:2007: E

4.2 Dibutyldisulfide, of nominal sulfur content 3
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