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Cartesian geometry energy dispersive X-ray fluorescence spectrometer

For rapid qualitative and quantitative elemental analysis

NEX CG

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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Features

  • 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


accessoriesAqueous 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.

NEX CG applications


Additive Elements in Lubricating Oils ASTM D7751

Measurement of additive elements in lubricating oils by ASTM D7751 is demonstrated.

Analysis of coal by FP method

The analysis of coal is demonstrated, with specific emphasis on the measurement of Na2O, using the Fundamental Parameters (FP) approach with Matching Library.

Analysis of finished Portland cement

The analysis of finished Portland cement is demonstrated using the empirical approach.

Analysis of gemstones.

Analysis of gemstones is demonstrated, using low power 50W EDXRF with indirect excitation

Analysis of heavy metals in aerosols on air filters

Measurement of heavy metals in aerosols on air filters is demonstrated. Simple linear empirical calibration is discussed, and performance is shown, for measurement precision and typical detection limits.

Analysis of Lead/Zinc Ore

The analysis of Pb/Zn ore is demonstrated using empirical calibration method.

Analysis of limestone

The analysis of limestone is demonstrated using the empirical approach.

Analysis of lube oils by FP method

This Application Note shows performance for the elemental analysis of P, S, Ca, Zn, Mg, Ba, Cu and Cl in a typical lubricating oil formulation using the fundamental parameters method (FP). Results are reported using standardless FP with and without the use of a Matching Library, and typical detection limits are presented.

Analysis of lube oils: empirical method

This Application Note shows performance for the elemental analysis of P, S, Ca, Zn, Mg, Ba, Cu and Cl in a typical lubricating oil formulation using the empirical method. Calibration summary and typical detection limits are presented, and instrument repeatability is demonstrated.

Analysis of PVC resins

This Application Note shows performance for the elemental analysis of Cl, Mg, Si, S, Ca, Ti, Mo and Sn in PVC resin. Empirical calibrations are shown for the quantitative analysis of the elements PVC resins, and instrument repeatability is demonstrated. Qualitative spectra are also shown, indicating the other trace elements in the resins (Cu, Zn, Cr, Sb, Fe, and Ni).

Analysis of rocks

This Application Note shows the analysis three rock Reference Materials from Rocklabs, Ltd., using Rigaku RPF-SQX fundamental parameters. Performance is shown for both hydraulically pressed pellets and loose powders.

Analysis of ULSD

This Application Note details performance for the measurement of sulfur in ULSD (ultra-low sulfur diesel) using the Rigaku NEX CG EDXRF analyzer.

ASTM C114 cement qualification

This Application Note demonstrates ASTM qualification for hydraulic cement analysis using the NEX CG EDXRF analyzer for the measurement of oxides in accordance with ASTM C114.

Brake Pads and Raw Material Mixtures

The elemental analysis of brake pads and raw material powders is demonstrated.

Lead (Pb) in gasoline by ASTM D5059 - 1443

Application Note 1443 details performance for measurement of lead (Pb) in gasoline per ASTM D5059.

Nickel ore processing

The analysis of nickel concentrate, filter cake, furnace matte and furnace slag is demonstrated.

Recycled automotive catalytic converters

The measurement of Pt, Rh and Pd in recycled automotive catalytic converters is demonstrated using the Fundamental Parameters (FP) approach.

Thin films on silicon

This App Note demonstrates the capabilities of the Rigaku NEX CG EDXRF analyzer for the measurement of thin film thickness (Tox) applied to semiconductor wafers. Simple 2-point empirical calibrations are used for SiO2, AlSi, Ti, TiN, Pt, AlCu, and BPSG single layer films on silicon substrates for use in quality control in the semiconductor industry.

Trace elements in aqueous solution with UltraCarry

Elemental analysis of aqueous solutions into the low ppm and sub-ppm concentration ranges was demonstrated, using the advanced Cartesian geometry Rigaku NEX CG Energy Dispersive X-ray Fluorescence (EDXRF) spectrometer in conjunction with the patented UltraCarry® sample preparation technique.

US EPA Tier 3 Gasoline

Compliance with the U.S. EPA Tier 3 Gasoline PBMS testing protocol and performance is demonstrated.

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