BS EN 15692:2021

What is BS EN 15692 about?  

BS EN 15692 discusses Determination of water content in Ethanol through Karl Fischer potentiometric titration method. BS EN 15692 specifies a method for the direct determination of water in ethanol to be used as a blending component for petrol, as well as in automotive ethanol (E85) fuel. 

Note 1: For the purposes of   BS EN 15692, the term “% (m/m)” is used to represent the mass fraction. 

Note 2: This method is applicable in the range 0,05 % (m/m) to 0,54 % (m/m). 

WARNING — Use of this document might involve hazardous materials, operations and equipment. This document does not purport to address all the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 

Who is   BS EN 15692 for? 

 BS EN 15692 on determination of water content is applicable to: 

• Test laboratories  
• Petroleum companies  
• Petrol suppliers 

Why should you use BS EN 15692?  

Being highly hygroscopic, ethanol will enable whatever fuel it's blended with to absorb more water. Water in fuel is rarely a good thing, and causes a number of problems for the equipment that uses that fuel. 

BS EN 15692 provides Karl Fischer potentiometric titration method to check the water content in the fuel so that the quality of the gasoline is maintained which will prevent the damage of the engine.  

What’s changed since the last update?  

BS EN 15692:2021 supersedes EN 15692:2009, which is withdrawn 

In BS EN 15692:2021 comparison with the EN 15692:2009, the following technical modifications have been made: 

• The original document was prepared by CEN/TC 19’s Ethanol Task Force under its Working Group 21 and is based on ISO 760. It is developed as an alternative to EN 15489 [2], delivering a method more widely used in the alcohol and beverage industry environment. 
• The test method has been revised in terms of its precision and scope. A second interlaboratory study (ILS) in 2010 confirmed the application to automotive ethanol (E85) fuel. Use of the method over time, especially in proficiency testing programmes, gave questions around whether the precision in the original document. When CEN/TC 19/WG 36 was requested to study the ILS reports, the recalculated precision results did not reflect the published precision. 
• The newly calculated precision is lower than the one published and the statistics allow introducing a constant reproducibility for the determination of water content in ethanol. The test method’s lower limit could remain at 0,05 % (whereas the lowest sample means was 0,02 %). the scope range has not been changed, but the precision calculations have