Modification of ASTM D2007 LC Separation

There is another widely used LC separation method, ASTM D2549. It is good for analyzing fuels in the diesel range that have low or no polar content 

The modified ASTM2007M method was verified against ASTM2549 and other separation techniques such as SFC, HPLC and FIA. The comparison of results obtained by different laboratories and different methods for various diesel fuels is shown in Table 1. The results are shown for five commercial diesel fuels, two synthetic cmde blends and two conventional diesel blends prepared by Shell Canada Ltd. with approximately 20wt% and 30wt% aromatics. Results are also shown for a certified low aromatic fuel supplied by Chevron Research and Technology Company (Chevron low aromatic), and a commercial low sulfur diesel (Refl). 

The results suggest a very good correlation between the methods and the laboratories. So the modified ASTM D2007M method together with the ASTM2549 method allow us to have two comparable techniques for separating samples with various polar content. 

The amount of sample required for analysis can also pose a problem in some cases when only small quantities are available (e g. fluid catalytic cracking-micro-activity test - FCC-MAT). 

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