ISO 20847:2004 PDF

Petroleum products — Determination of sulfur content of automotive fuels — Energy-dispersive X-ray fluorescence spectrometry

Open preview (PDF)

Title (English):

ISO 20847:2004

Petroleum products — Determination of sulfur content of automotive fuels — Energy-dispersive X-ray fluorescence spectrometry

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 11
Publication date:: March 8, 2004
Edition:: ISO IS 20847 edition 1 version 1
ICS:: 75.080

Delivery type:

Full version25 €Read online 24h10 €Read online 72h15 €

Document language:

enru

Delivery time:Immediate download

Price:25 €

Description (English):

ISO 20847:2004 specifies an energy dispersive X-ray fluorescence (EDXRF) test method for the determination of the sulfur content of motor gasolines, including those containing up to 2,7 % (m/m) oxygen, and of diesel fuels, including those containing up to 5 % (V/V) fatty acid methylester (FAME), having sulfur contents in the range 30 mg/kg to 500 mg/kg. Other products may be analysed and other sulfur contents may be determined according to this test method, however, no precision data for products other than automotive fuels and for results outside the specified range have been established for ISO 20847:2004. For reasons of spectral overlap, ISO 20847:2004 is not applicable to leaded motor gasolines, lead-replacement gasolines containing 8 mg/kg potassium to 20 mg/kg potassium, or to products and feedstocks containing lead, silicon, phosporus, calcium, potassium or halides at concentrations greater than one-tenth of the concentration of sulfur measured.

Technical details

Technical committee: ISO/TC 28 - Petroleum and related products, fuels and lubricants from natural or synthetic sources
SKU: ISO 20847:2004

Abstract

Overview

ISO 20847:2004 specifies an energy-dispersive X‑ray fluorescence (EDXRF) test method for the determination of sulfur content in automotive fuels. The method targets motor gasolines (including those with up to 2.7 % m/m oxygen) and diesel fuels (including up to 5 % V/V FAME) with sulfur concentrations in the 30 mg/kg to 500 mg/kg range. The standard defines instrumentation, sample handling, calibration and quality control practices for reliable sulfur measurement by EDXRF. It also notes limitations (e.g., spectral overlap) that make the method inapplicable to certain leaded or element-contaminated products.

Key topics and technical requirements

Principle: Measure sulfur K‑line characteristic X‑radiation from a liquid fuel test portion using EDXRF and compare net counts against a calibration curve.
Scope limits: Applicable primarily to automotive fuels within 30–500 mg/kg sulfur; precision data are established only for these materials and range.
Interferences: Not applicable to leaded gasolines, some lead‑replacement fuels (e.g., containing ~8–20 mg/kg K), or samples with Pb, Si, P, Ca, K or halides at >1/10 of the sulfur concentration due to spectral overlap.
Instrument requirements:
- EDXRF analyser with background subtraction and capability to measure sulfur at 50 mg/kg with ≤3% counting‑statistic RSD.
- X‑ray source with significant flux above 2.5 keV; detector resolution ≤800 eV at 2.3 keV.
- Removable sample cup (≥5 mm depth) with X‑ray‑transparent film (2–6 µm polyester preferred) and helium purge for stability.
- Ability to measure scattered radiation (for matrix compensation) or multiple energy regions to correct background.
Calibration and standards:
- Use certified reference materials (CRMs) or primary standards prepared from known sulfur compounds.
- Primary standards ~1 000 mg/kg and ~5 000 mg/kg; calibration points typically include 1 000, 500, 300, 100 and blank; for low sulfur (

Related standards

Other ISO standards

Abstract

Overview

Key topics and technical requirements

Principle: Measure sulfur K‑line characteristic X‑radiation from a liquid fuel test portion using EDXRF and compare net counts against a calibration curve.
Scope limits: Applicable primarily to automotive fuels within 30–500 mg/kg sulfur; precision data are established only for these materials and range.
Interferences: Not applicable to leaded gasolines, some lead‑replacement fuels (e.g., containing ~8–20 mg/kg K), or samples with Pb, Si, P, Ca, K or halides at >1/10 of the sulfur concentration due to spectral overlap.
Instrument requirements:
- EDXRF analyser with background subtraction and capability to measure sulfur at 50 mg/kg with ≤3% counting‑statistic RSD.
- X‑ray source with significant flux above 2.5 keV; detector resolution ≤800 eV at 2.3 keV.
- Removable sample cup (≥5 mm depth) with X‑ray‑transparent film (2–6 µm polyester preferred) and helium purge for stability.
- Ability to measure scattered radiation (for matrix compensation) or multiple energy regions to correct background.
Calibration and standards:
- Use certified reference materials (CRMs) or primary standards prepared from known sulfur compounds.
- Primary standards ~1 000 mg/kg and ~5 000 mg/kg; calibration points typically include 1 000, 500, 300, 100 and blank; for low sulfur (

ISO 20847:2004 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

Related standards

Systems and software engineering — Software life cycle processes

Asset management — Vocabulary, overview and principles

Asset management — Asset management system — Requirements

Information technology — Radio frequency identification device conformance test methods — Part 2: Test method…

Information technology — Multimedia framework (MPEG-21) — Part 22: User Description

Milk — Determination of the lactoperoxidase activity — Photometric method (Reference method)

Carbonaceous materials for the production of aluminium — Cold and tepid ramming pastes — Expansion/shrinkage…

Agricultural machinery — Safety — Part 13: Large rotary mowers