With U.S. Federal and international regulations becoming increasingly stringent, the need to determine the sulfur content of petroleum oils and fuels is a critical issue. In crude oil, sulfur can be present in concentrations up to 5% by weight. The distalliation of fel products from these crde oils will produce products varying concentrations of sulfur. Hazardous air pollution is caused by sulfur oxides coming from the burning of sulfur containing fuels. In addition, there are harmful effects on engines, when they are being operated with fuels contaiing more sulfur than these permitted levels. it is therefore essential that sulfur concentrations be closely monitored and controlled in all petroleum products.

Energy Dispersive X-ray Fluorescence (EDXRF) is a well established technique for the analysis of sulfur in petroleum products. The analysis requirements for these techniques are established through international standards such as ASTM and ISO. The versatile MESA 7220 can be used in a wide range of applications for sulfur and chlorine in the range of 1 ppm to wt% levels. It automatically corrects for interferences coming from matrix differences or interfering elements.A variety of contemporarty petroleum products are measured with the MESA 7220:

• Ultra Low Sulfur Diesel (ULSD) Straight Run Gasoline and RFG
• Diesel
• Kerosene/Jet Fuel
• Biodiesel/Biodiesel Blends
• Transformer Oil/Hydraulic Oil
• Crude Oil
• No. 2 Home Heating Oil

The MESA 7220 performance is compliant with ASTM and ISO International Sulfur Determination Norms:

• ASTM D7220 [Updated Method with higher performance now available!]
• ASTM D4294
• IP 532
• EN ISO 8754
• EN ISO 13032
• EN ISO 20847

The MESA 7220 can analyze both S and Cl simultaneously, in addition, measure low levels of chlorine in the presence of high sulfur. This is achieved thru the use of algorithmic software correction for Sulfur.

The MESA 7220 features a unique, patented design with a close-coupled, doubly curved HOPG X-ray optic. It simultaneously polarizes, focuses, and mono-chromates the X-ray beam. This yields the ideal X-ray source for measuring S, Cl and lower atomic number elements. This technique creates an environment with ultralow background similar to other optics-based X-ray analyzers, but retains the EDXRF benefit of allowing for simultaneous analysis of multiple elements.

MESA 7220 Software Designed for Easy Operation

• Multi-tasking dual functioning screen
• Intuitive touch screen
• Create unlimited number of calibration curves
• Password protection for supervisor setup
• Onscreen diagnostics for operating parameters
• Spectral display of final analysis
• Unlimited data storage
• Critical calibration curve information and plot display
• Easy to view results with statistics

The MESA-7220 is based on the latest advances in Energy Dispersive X-ray Fluorescence (EDXRF) technology. It features diffractive optics for ultra high performance for low atomic elements - specifically S and Cl - in oils and other fluids. This approach is critical for a user to achieve the ultra low noise background for the best limits of detection for S, Cl, and other elements.

The MESA 7220 is a specialized, compact XRF workstation that offers superior measurement of S and Cl in petroleum-based products. MESA 7220 technology is based on the latest tube and detector technologies in Energy Dispersive X-ray Fluorescence (EDXRF) and utilizing closely coupled monochromatic, polarized EDXRF analysis techniques. It was developed specially for HORIBA Scientific Elemental Analyzers Product Line utilizing Olympus field-proven EDXRF technology that originated from on-board oil and fuel analysis specially built for the marine shipping industry.

Quick & Accurate

• Typical test times are 3 minutes per sample for less than 50 ppm concentrations
• Less than 2 minutes per sample for concentrations above 50 ppm
• Detection limits for S and Cl are in the low ppm level with an upper range in the % level
• Simultaneous multielement determination capability
• New technology eliminates oxygen interference that can vary results significantly

Easy

• Touchscreen graphical user interface displays all the important functions for routine operation at a glance
• USB ports allow a supervisor to easily plug in a keyboard and mouse to handle more complex tasks

Clean

• Unlike some methods for S and Cl, the MESA 7220 models are low maintenance and do not require furnaces, conversion gases or micro syringes

For additional information on the MESA 7220 from our exclusive distributor, please visit the Horiba website.