ISO 20846:2019
Petroleum products — Determination of sulfur content of automotive fuels — Ultraviolet fluorescence method

Standard No.

ISO 20846:2019

Release Date

2019

Published By

International Organization for Standardization (ISO)

Latest

ISO 20846:2019

Scope

This document specifies an ultraviolet (UV) fluorescence test method for the determination of the sulfur content of the following products: — having sulfur contents in the range 3 mg/kg to 500 mg/kg, — motor gasolines containing up to 3,7 % (m/m) oxygen [including those blended with ethanol up to about 10 % (V/V)], — diesel fuels, including those containing up to about 30 % (V/V) fatty acid methyl ester (FAME), — having sulfur contents in the range of 3 mg/kg to 45 mg/kg, — synthetic fuels, such as hydrotreated vegetable oil (HVO) and gas to liquid (GTL). Other products can be analysed and other sulfur contents can 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 this document. Halogens interfere with this detection technique at concentrations above approximately 3500 mg/kg. NOTE 1 Some process catalysts used in petroleum and chemical refining can be poisoned when trace amounts of sulfur-bearing materials are contained in the feedstocks. NOTE 2 This test method can be used to determine sulfur in process feeds and can also be used to control sulfur in effluents. NOTE 3 For the purposes of this document, “% (m/m)” and “% (V/V)” are used to represent the mass fraction, w, and the volume fraction, φ, of a material respectively. NOTE 4 Sulfate species in ethanol do not have the same conversion factor of organic sulfur in ethanol. Nevertheless, sulfates have a conversion factor close to that of organic sulfur. NOTE 5 Nitrogen interference can occur, see 6.5 for further guidance.

ISO 20846:2019 Referenced Document

• ISO 1042 Laboratory glassware - One-mark volumetric flasks
• ISO 12185 Crude petroleum, petroleum products and related products*， 2024-01-01 Update
• ISO 3170 Petroleum liquids - Manual sampling
• ISO 3171 Petroleum liquids; automatic pipeline sampling
• ISO 3675 Crude petroleum and liquid petroleum products — Laboratory determination of density — Hydrometer method — Amendment 1

ISO 20846:2019 history

• 2019 ISO 20846:2019 Petroleum products — Determination of sulfur content of automotive fuels — Ultraviolet fluorescence method
• 2011 ISO 20846:2011 Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method
• 2004 ISO 20846:2004 Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method