Faster, Easier Elemental Analysis for Every Petroleum Application

Every petroleum product, from heavy crude oils to finished fuels, depends on reliable elemental data. But too often, that analysis comes with long turnaround times, complex sample prep, and higher operating costs. 

Rigaku’s NEX series energy dispersive X-ray fluorescence (EDXRF) analysers are designed to change that. Whether you are running daily quality checks, tracking trace metals, or monitoring real-time blending, the NEX line delivers reliable results without the tradeoffs. They are purpose-built for petroleum applications.

Benchtops

NEX QC Series — Confidence for Everyday QC

When you need fast answers for daily QA/QC, the NEX QC Series provide multi-element performance in one compact system. Designed for affordable routine analysis, it measures sulphur and other key elements across crude, fuels, and other products. No external computer is needed.

Complies with: ASTM D4294, D8252-19, ISO 13032, ASTM D5059.

Best for: Field labs and facilities that need quick, dependable verification.

NEX DE Series — High Precision Without the Hassle

When your lab demands high performance, but you do not want to wrestle with calibration standards, the NEX DE Series analysers deliver. Its Rigaku Matching Library software reduces standards requirements and easily handles high-throughput multi-elemental analysis for sulphur, chlorine, nickel, vanadium, and other key elements across a range of petroleum samples. Additionally, the NEX DE VS model is perfect for in-plant forensics using small spot analysis.

Complies with: ASTM D4294, ASTM D8252-19, ISO 13032, and ASTM D4929 Part C.

Best for: Refineries, midstream labs, and QA teams who need rapid, reliable precision.

NEX CG II Series — For Trace-level Sensitivity and Complex Matrices

For researchers and commercial labs, the NEX CG II Series is your all-in-one benchtop for trace-level elemental analysis. Using indirect excitation with secondary targets, it achieves exceptional sensitivity, even with variable base matrices. Additionally, you can create your own Matching Libraries to tailor calibrations for your unique needs and formulations, all within an intuitive software interface that saves you time and reduces costs.

Complies with: EPA Tier 3 and ASTM D7220 for ULSD sulphur, ASTM D5059 Parts A and C for lead using the Bi internal standard method, ASTM D5059 Part D for manganese at ultra-low levels, and ASTM D4929 Part C for chlorine, where it delivers the lowest detection limits in its class.

Best for: Commercial testing labs, research facilities, and advanced QA environments that require trace-level precision.

Real-Time Analysis 

When you want to reduce sampling requirements for the lab, Rigaku’s on-line analysers bring continuous monitoring to your process lines. These systems help you cut sampling time, spot upset conditions instantly, and keep your processes running in spec.

NEX XT — This system provides real-time total sulphur measurement from 0.04 to 6 wt% for various petroleum streams such as crudes, bunker fuels, fuel oils, and other viscous hydrocarbons, including residuums. The NEX XT is ideal for refineries, pipeline monitoring, blending operations, bunkering terminals, and other storage facilities.

NEX OL — For multi-element analysis of liquid streams, the NEX OL is recommended for monitoring cobalt, manganese, and bromine catalysts in PTA and catalysts recovery processes.

Want to talk to an EDXRF expert?

Experience how Rigaku EDXRF systems make petroleum testing faster, easier, and more cost-effective. Visit the website or email Rigaku to connect with the team.