J&W Biodiesel Gas Chromatography (GC) columns are designed and application-optimized for the analysis of biodiesel to meet ASTM and EN testing standards, including ASTM D6584, EN14013, EN14105, EN14106, and EN14110. Engineered to meet the growing demand for analysis of biofuels as supplements or replacements for petroleum-based fuels, the column provides the highest level of performance for the determination of free and total glycerin, FAMEs, and trace methanol.