ASTM D4546-21 serves as a primary tool for quality control and regulatory compliance. Unlike older methods that might rely on broad measurements, this standard utilizes the separation power of HPLC to identify specific sulfur species, offering a detailed fingerprint of the fuel's composition.
is a critical standard in the petroleum and energy sector, providing a rigorous methodology for determining total sulfur content in light hydrocarbons. As environmental regulations regarding sulfur emissions (such as IMO 2020 and Tier 3 gasoline standards) become increasingly stringent, the precision offered by High Performance Liquid Chromatography (HPLC) becomes indispensable. This report explores the significance, technical methodology, and industrial impact of the 2021 revision of this standard. astm d454621 pdf