ASTM D-6890 (Test Method for Determination of Microbial Contamination in Fuels and Fuel Systems)

ASTM D-6890 is a standard test method used to measure microbial contamination in fuels and fuel systems. It assesses the presence of microorganisms, like bacteria and fungi, which can grow in fuels, especially when water is present. This contamination can lead to fuel degradation, corrosion of equipment, and operational issues. The test involves collecting fuel samples, enriching them to promote microbial growth, and then analyzing the samples to quantify any microbial presence. This information helps ensure the quality and reliability of fuels, which is crucial for effective engine performance and maintenance.