Sulfur in Oil Concentration

Ask the Expert Question:
We have had a need to analyze diesel fuel samples for sulfur and heat content analysis utilizing SW-846 Method 5050 and 9056 as the analytical procedure used to determine sulfate percent. Some of the samples may be analyzed for air permit compliance. The permits require us to have the sulfur content analyzed by ASTM D4294 or equivalent method.

I have read through the documentation on ASTM D4294, SW-846 Method 5050, and SW-846 Method 9056. It appears to me that the methods get to the same end point - sulfur content. However, I would like a second opinion from one of your content experts that confirms what I have concluded.

Experts Response:
The ASTM D4294 (energy dispersive X ray fluorescence technique) is widely used for measurement of sulfur in oils.

The EPA Methods 5050 and 9056 (determination of sulfate ion concentration) is a complete oxidation using a bomb calorimeter followed by analysis of the resulting sulfate. This technique is used for sulfur in oil and waste products and has been used for decades. This is a highly reliable method for determination of sulfur in oils.

Both techniques should give similar results.

View Dr. Charlie Carter's Experts profile