Simplifying petroleum elemental testing using EDXRF

Whether you are verifying sulphur content, tracking trace metals, monitoring contaminants, or requiring elemental composition for other applications, having quick, reliable elemental data is crucial for ensuring product quality, meeting contractual agreements, complying with regulations, and driving process improvements. While other testing methods provide reliable results, they often involve lengthy turnaround times, complex sample prep, and higher overall analysis costs.

Energy dispersive X-ray fluorescence (EDXRF) offers a cost-effective approach to rapid elemental analysis. It is a simple and easy-to-use technique, and Rigaku’s NEX Series analysers are designed to support a broad range of petroleum industry needs. From routine quality control to research applications to real-time process monitoring, each system is engineered for easy operation and low cost of ownership.

Rigaku EDXRF benchtop analysers are built to handle petroleum applications, from verifying sulphur in fuels to detecting trace metals in crudes or lubricants. Users benefit from minimal sample preparation and software that simplifies calibration and method management. Additionally, they support compliance with various international testing methods and standards with low per-sample costs and minimal consumable requirements. 

Rigaku’s EDXRF benchtop portfolio spans multiple performance levels, giving customers flexibility to match analytical requirements without exceeding budget constraints. Below is a quick comparison of these models:

The NEX QC Series models provide dependable multi-element performance in a compact system with a built-in computer and printer. These analysers are ideal for field labs, terminals, and production facilities that need rapid verification. Designed for simplicity and affordability, they deliver reliable results for sulphur and other key elements across a wide variety of petroleum products. Supports compliance with: ASTM D4294, D8252-19, ISO 13032, ASTM D5059.

For facilities that need more flexibility and throughput, the NEX DE Series models combine high performance with streamlined operation. Matching Library software reduces standards requirements, and the VS option provides small-spot analysis for in-plant forensics. These systems are well-suited for measuring sulphur, chlorine, nickel, vanadium, and other critical elements. Supports compliance with: ASTM D4294, D8252-19, ISO 13032, ASTM 5059, ASTM D4929 Part C.

For complex samples and ultra-low detection limits, the NEX CG II Series uses indirect excitation with secondary targets to achieve exceptional sensitivity across variable matrices. This makes them ideal for R&D, contract testing, and advanced QA environments, where they can analyse everything from trace metals to additives. Custom Matching Libraries can be built directly within the software, saving time and reducing calibration standards costs. Supports compliance with: EPA Tier 3 and ASTM D7220 for ULSD sulphur, ASTM D5059 for manganese and trace lead, and ASTM D4929 for trace chlorine.

In continuous operations, reducing laboratory sampling can save both time and cost. Rigaku’s on-line analysers extend elemental analysis to the process line. These systems help identify upsets sooner, maintain tighter control, and ensure every product stream stays within specification.

The Rigaku NEX XT provides continuous total sulphur analysis from 0.04 to 6 wt% in various petroleum streams, including crudes, bunker fuels, and residuums. It’s ideal for refineries, blending operations, pipeline monitoring, and storage terminals where uptime and reliability are critical.

For on-line, multi-element monitoring of liquid streams, the NEX OL offers simultaneous measurement of elements such as cobalt, manganese, and bromine. It is well-suited for PTA production and catalyst recovery processes.