Cartesian geometry energy dispersive X-ray fluorescence spectrometer

For rapid qualitative and quantitative elemental analysis


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

optical schematic

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. By using monochromatic secondary target excitation, instead of convention direct excitation, sensitivity is further improved. The resulting dramatic reduction in background noise, and simultaneous increase in element peaks, result in a spectrometer capable of routine trace element analysis even in difficult sample types.

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.

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  • Analyze ₁₁Na to ₉₂U non-destructively
  • Solids, liquids, powders and thin films
  • Polarized excitation for lower detection limits
  • Novel treatment of peak overlap reduces errors
  • PPB detection limits for aqueous samples using UltraCarry
  • Simplified user interface with EZ Analysis
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NEX CG accessories

Aqueous Liquid Sample Carrier for PPB-level Trace Element Analysis
With the patented Rigaku UltraCarry, you can use your Rigaku NEX CG spectrometer to quantify trace elements in aqueous liquids down to parts-per-billion (ppb) concentration levels. Routine elemental analysis of contaminated water or industrial wastewater can now be performed without an Atomic Absorption (AA) or Inductively Coupled Plasma (ICP) spectrometer. UltraCarry based trace element analysis is suitable for use by non-technical personnel.
  • Analyze a wide range of elements (11Na to 92U)
  • PPB-level elemental detection limits for aqueous samples
  • Simple three-step process: pipette, dry and measure
  • Easy-to-use EZ Analysis NEX CG user interface

EDXRF trace element analysis only from Rigaku
UltraCarry is a novel disposable (single-use) sample retainer for X-ray fluorescence (XRF) analysis that is used to preconcentrate a liquid sample into an uniform sample carrier that is optimized for the suppression of background noise. This approach dramatically improves the signal-to-noise ratio, resulting in almost three orders of magnitude improvement in the Lower Limit of Detection (LLD or LOD) and Limit of Quantification (LOQ) for heavy elements.
The UltraCarry sample retainer comprises a ring-shaped support fitted with a X-ray transmissive hydrophobic film and central liquid absorbent element pad. For routine analysis using UltraCarry, a recommended vacuum dryer apparatus — Rigaku UltraDry — is available as an XRF accessory.

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