Skip to main content
  • Analyze from sodium (₁₁Na) through uranium (₉₂U)
  • Non-destructive elemental analysis
  • Quantify solids, slurries, liquids, powders and coatings
  • Polarized excitation delivers lower detection limits
  • High resolution silicon drift detector (SDD)
  • Analysis in air, helium or vacuum
  • RPF-SQX for semi-quantitative analysis without standards
  • Semi-empirical calibrations require very few standards
  • Advanced novel treatment of peak overlap reduces errors
  • EZ Analysis interface for routine operation
  • Standard 15-position automatic sampler

Cartesian geometry energy dispersive X-ray fluorescence spectrometer

Elemental analysis of solids, liquids, powders, alloys and thin films

Rigaku NEX CG delivers rapid qualitative and quantitative determination of major and minor atomic elements in a wide variety of sample types — with minimal standards.

Cartesian geometry for trace level sensitivity

Unlike conventional EDXRF analyzers, the NEX CG was engineered with a unique close-coupled Cartesian Geometry (CG) optical kernel that dramatically increases signal-to-noise. Monochromatic or polarized excitation from secondary targets, instead of conventional “noisy” white radiation (Bremsstrahlung) direct excitation, vastly improves detection limits for elements in highly scattering matrices like water, hydrocarbons, and biological materials. The resulting dramatic reduction in background noise, and simultaneous increase in element peaks, affords a spectrometer capable of routine trace element analysis even in difficult sample types. Up to five secondary targets cover the complete elemental range (Na – U) with optimized sensitivity. Excitation is provided by a close-coupled 50 watt Pd-anode end-window X-ray tube. For maximum stability, the tube is fitted with a shutter so that the tube may remain on at all times for maximum stability and durability. An available uninterruptable power supply (UPS) compensates for power line fluctuations and extends tube life. Superior counting statistics and designed-in high stability translate into extraordinary analytical performance.

Highest sensitivity for broad flexibility

As a multi-purpose, high-performance EDXRF spectrometer, the Rigaku NEX CG delivers routine elemental measurements across a diverse range of matrices — from homogeneous, low viscosity liquids to solids, metals, slurries, powders, pastes and thin films. Especially well-suited to the semi-quantitative determination of elemental content in complete unknowns, the superior analytical power, flexibility and ease-of-use of the Rigaku NEX CG add to its broad appeal for applications ranging from research & development to industrial and in-plant quality assurance.

Novel software reduces the need for standards

NEX CG is powered by a new qualitative and quantitative analytical software, RPF-SQX, that features Rigaku Profile Fitting (RPF) technology. The software allows semi-quantitative analysis of almost all sample types without standards — and rigorous quantitative analysis with standards. Rigaku NEX CG software was developed to be both extraordinarily powerful and extremely easy to use. Ideal for non-technical operators, routine analyses are performed through a simplified customizable EZ Analysis interface. Software operation simply involves selecting the sample position on the computer screen and entering a sample name. Next, the application method (i.e., calibration) is selected. Selecting the “start” button with the mouse pointer initiates the analysis. The depth and breadth of features, as well as the sophistication of the interface, is the result of decades of XRF software development at Rigaku.


Product name NEX CG
Technique X-ray fluorescence (XRF)
Benefit Elemental analysis of solids, liquids, powders, alloys and thin films
Technology Cartesian geometry energy dispersive XRF (EDXRF) using SDD detector
Core attributes 50 W, 50 kV X-ray tube, SDD detector, analyze Na to U, autosampler, He-flush
Core options Vacuum, sample trays, sample spinner, UPS, printer
Computer External PC, MS Windows® OS , QuantEZ software
Core dimensions 600 (W) x 400 (H) x 600 (D) mm
Mass Approx. 80 kg (core unit)
Power requirements 1Ø, 100/220 VAC 50/60 Hz, 15/7 A


The following applications are relevant to this product