Ensure Accurate Results for Sulfur & Chlorine Analysis in Biodiesels

Typical biodiesels are known to have an oxygen concentration which is higher than that of traditional diesels. This high oxygen content (most commonly between 9 – 11 wt%) can cause XRF analyzers to report lower sulfur and chlorine concentrations due to absorption of the XRF signal by the oxygen. To address this bias and ensure an accurate measurement, two techniques are recommended: applying a correction factor to the measurement results, or matrix matching the calibration standards to the oxygenated biofuel samples.