Determination of Aromatic Hydrocarbons in Diesel Fuel by LC-RID According to ASTM D6591
The test method presented here is applicable to the determination of mono-, di-, and tri-plus aromatic hydrocarbon (MAH, DAH, and T+AH, respectively) content in diesel fuels and middle distillates with boiling points in the range of 150° to 400° C in accordance with ASTM D6591. The accurate determination of the aromatic content of fuels is critical to assessing their quality and combustion characteristics. These parameters are also crucial to ensuring compliance with environmental regulations.
This method presents an alternative to ASTM D1319, which is the EPA standard method for quantification of aromatics in diesel fuel. Though ASTM D1319 has enjoyed widespread use, it relies on the use of a fluorescent dye which was discontinued and its replacement no longer produces reliable results, particularly for middle distillates. As such, many laboratories are exploring alternative methods for determination of the total aromatics in diesel fuels, such as ASTM D6591.
This application news demonstrates the use of the Shimadzu Prominence™ HPLC for the determination of MAHs, DAHs, and T+AHs in diesel fuel and other middle distillates in compliance with parameters set out in ASTM D6591. Due to the use of a 3 micrometer packing analytical column, the instrument is also in compliance with ASTM D6379 for jet fuel, kerosene, and middle distillates with boiling points in the range of 50° to 300° C without change to the instrument configuration.
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