Background

Recent developments in ultra low sulfur diesel (ULSD) fuel has improved fuel efficiency and created cleaner exhaust gas and permitted limit of sulfur in fuel oils has been decreased to 10 or 15 ppm as the limit in most countries. There is a strong possibility that these regulations can become even more severe. For compliance verification, X-ray fluorescence (XRF) spectrometry is the definitive analysis tool for use at distribution terminal, as well as mobile or stationary testing laboratories. This application note demonstrates that Mini-Z Sulfur Analyzer can meet the requirements of ASTM D2622-10. Mini-Z Sulfur Analyzer (hereafter called “Mini-Z S”), a benchtop single fixed-channel wavelength dispersive X-ray fluorescence (WDXRF) spectrometer, is designed to minimize the restrictions in installation such as cooling water, special power supply, installation space, etc. The Mini-Z S is equipped with an air-cooled 40 W Cr-target X-ray tube and the RX-9 analyzing crystal, optimized for sulfur analysis. The Mini-Z S has a built-in operation control panel, which enables simple and easy operation.