ISO 20424:2019 PDF
Fatty acid methyl esters (FAME) — Determination of sulfur content — Inductively coupled plasma optical emission spectrometry (ICP-OES) method
Fatty acid methyl esters (FAME) — Determination of sulfur content — Inductively coupled plasma optical emission spectrometry (ICP-OES) method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 10
- Дата публикации:
- 14 ноября 2019 г.
- Издание:
- ISO IS 20424 edition 1 version 1
- ICS:
- 75.160.40
This document specifies a test method for inductively coupled plasma optical emission spectrometry (ICP-OES) for the detection of the sulfur content from 2 mg/kg to 21 mg/kg in fatty acid methyl esters (FAME). NOTE 1 For the purposes of this document, the term "% (m/m)" is used to represent the mass fraction (µ) of the material. NOTE 2 The method can also be used for the determination of concentrations outside the given limits. The precision statement, however, is only valid for the concentration range given in the scope. NOTE 3 The method described in the document was tested with FAME derived from soybean oil and beef tallow. FAME derived from other feedstock, in particular aged oils, may behave different due to the different nature of sulfur compounds.
Abstract
Overview
ISO 20424:2019 specifies an analytical test method to determine sulfur content in fatty acid methyl esters (FAME) using inductively coupled plasma optical emission spectrometry (ICP‑OES). The method is validated for sulfur concentrations from 2 mg/kg to 21 mg/kg (mass fraction, % m/m) and was evaluated using FAME from soybean oil and beef tallow. The standard supports quality control of biodiesel (FAME) used as fuel or as a blending component.
Key topics and requirements
- Scope and limits: Detection range 2–21 mg/kg; method may be used outside this range but precision data apply only within the stated range.
- Analytical principle: Weighed FAME is diluted with a low‑sulfur solvent and introduced into the ICP‑OES; sulfur emission intensities are related to concentration via linear regression.
- Sample preparation:
- Sample must be clear/bright; heat to 50 °C if turbid (discard if turbidity persists).
- Typical preparation: 5.0 g sample diluted to 25 g with a sulfur‑free diluent (kerosene suggested).
- Reagents and standards:
- Diluent solvent with sulfur
Технические детали
- Технический комитет
- ISO/TC 28/SC 7 - Liquid Biofuels
- SKU
- ISO 20424:2019
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