Sulfur in petroleum products according to ISO 20884 and ASTM 2622
Crude oil contains typically between 0.5 and 5 % sulfur. Environmental considerations require emissions from petroleum products derived from these crude oils to contain limited levels of sulfur. The sulfur content of both intermediary and end-products (fuels, oils, gasolines) needs to be accurately controlled according to test methods such as ASTM 2622 and ISO20884. These employ wavelength dispersive X-ray spectroscopy (WDXRF) and mathematical matrix corrections procedures. XRF is an excellent method for determination of sulfur in petroleum products. It produces fast, cost-effective, precise and accurate data. Data can be used for quality control, product development and product performance classification. XRF provides very stable data. Thanks to the integral smart monitor program individual calibrations can be used for months, avoiding time-consuming and costly re-standardization. Automated analysis reduces measurement times down to two minutes and efficient sample preparation methods support analysis rates of more than ten samples per hour. User-friendly software allows routine analysis to be carried out by factory operators.