Biodiesel Testing

Biodiesel fuel benefits depend on the properties of the fuel produced.  Refiners and distributors ensure the quality of this alternative fuel by meeting the standards specified by the American Society for Testing and Materials (ASTM).

The ASTM guidelines place maximum and/or minimum limits on 4 biodiesel characteristics: 

1) Flash Point.  The flash point is the lowest temperature for which combustion is possible.  If too low, then inadvertent combustion may occur which is of course a safety hazard.  Producers should always test biodiesel fuel for the flash point to ensure the safety of distributors, retailers and consumers.

2) Contamination.  Water and sediment does not present a safety concern, these contaminant materials can have has undesirable mechanical effects: clog filters, reduce ignition performance, and have a negative impact upon the fuel pump. 

The ASTM specifications refer to the amount of water dissolved; not to the water coexisting in bulk form within a tank. 

3) Microbes.  Water included in the blend may also stimulate the growth of microbes, especially in warmer temperatures.  The microbes produce deposits that can aid the clogging of the water upon filters. 

4) Glycerin.  Glycerin is a natural byproduct of biodiesel production. A large glycerin content in the final product can indicate that the manufacturing process used to transform oils and fats into fatty acid methyl esters (FAME) was incomplete.   High glycerin content can likely result in the clogged filters and in the contamination of injectors.

For biodiesel fuel testing, kits and information is offered by Midwest Laboratories in accordance with ASTM 6751 for B100 - Biodiesel.  Midwest Labs works with clients to develop testing packages that suit your specific needs.

For additional information, please contact bpohlman@midwestlabs.com