5.1 Biodiesel is a fuel commodity primarily used as a value-added blending component with diesel fuel. It is important to check the concentration of biodiesel in the diesel fuel in order to make sure it is within limits or does not exceed the maximum allowable limit.

5.2 This test method is applicable for quality control in the production and distribution of diesel fuel and biodiesel blends.

5.3 This test is simple to run, completed in less than one minute, with no dilution of the test sample, no cleaning solvents are required, and the analyzer is portable and self-contained.

1.1 This test method covers the determination of the content of biodiesel (fatty acid methyl esters (FAME)) in diesel fuel oils for volume fractions of 0.1 % to 31.0 % by mid-infrared analyzer with a resolution of 0.1 %.

1.2 The accuracy of this test method is based on the molecular weight of C16 and C18 FAME species.

1.3 It is not possible to distinguish between vegetable oils, animal fats, FAEE, and FAME. For more information, see Section 6.

1.4 This test method has interim repeatability precision only, see Section 14 for more information.

1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.