NEX CG II Energy Dispersive X-ray Fluorescence Spectrometer

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Next-generation Advanced Cartesian Geometry EDXRF
for Rapid Qualitative and Quantitative Elemental Analysis

NEX CG II

3D Cartesian Geometry (CG)
X-ray optics
NEX CG II

NEX CG II, a powerful second-generation energy dispersive X-ray fluorescence (EDXRF) spectrometer, delivers rapid qualitative and quantitative determination of major and minor atomic elements in a wide variety of sample types — from oils and liquids to solids, metals, polymers, powders, pastes, coatings, and thin films.

  • Non-destructive elemental analysis for sodium (Na) to uranium (U)
  • Quick elemental analyses of solids, liquids, powders, coatings, and thin films
  • Indirect excitation for exceptionally low detection limits
  • High-power 50 kV 50 W X-ray tube
  • Large-area high-throughput silicon drift detector (SDD)
  • Analysis in air, helium, or vacuum
  • Powerful and easy to use QuantEZ® software with multilingual user interface
  • Advanced RPF-SQX Fundamentals Parameters software featuring Scattering FP
  • Rigaku Profile Fitting (RPF) advanced algorithm for peak deconvolution
  • Various automatic sample changers accommodating up to 52 mm samples
  • Low cost of ownership backed by a 2-year warranty



Industrial Quality Control to Advanced Research Applications

The Rigaku NEX CG II is a multi-element, multi-purpose analyzer, ideal for measuring ultra-low and trace element concentrations into the percent levels. Especially well-suited for semi-quantitative determination of elemental content in complete unknowns, NEX CG II serves many industries. Applications range from research and development to industrial and in-plant quality assurance. It is easy to use for non-technical operators yet powerful enough for expert use in commercial labs and R&D facilities. Users can achieve the lowest limits of detection and easily manage complex applications like testing agricultural soils, and plant materials, analyzing finished animal feeds, measuring waste oils, environmental monitoring, and many others.

Cartesian Geometry and Polarization for Trace Level Sensitivity

Unlike conventional EDXRF spectrometers, NEX CG II is an indirect excitation system using secondary targets rather than tube filters. Monochromatic and polarized excitation from secondary targets vastly improves detection limits for elements in highly scattering matrices like water, hydrocarbons, and biological materials. Secondary target excitation in full 90° Cartesian Geometry eliminates background noise. As a result, NEX CG II brings a new level of analytical sensitivity to XRF technology. Users can measure ultra-low and trace element concentrations, even in challenging sample types.

Easy Instrument Control with Advanced Qualitative and Quantitative Analytical Software

NEX CG II is easy to use with QuantEZ, a powerful PC-based software providing intuitive instrument control with simple menu navigation and a customizable EZ Analysis interface. Users can maximize their time and productivity with simplified routine operations and create their own methods using a simple flow bar wizard.

Advanced qualitative and quantitative analysis is powered by Rigaku’s RPF-SQX Fundamental Parameters (FP) software, featuring Rigaku Profile Fitting (RPF) technology and Scattering FP.









NEX CG II Cartesian Geometry



Unique 3D Cartesian Geometry Optical Kernel Dramatically Increases Peak-to-background Ratio

NEX CG II builds on NEX CG’s legacy of using Cartesian Geometry and secondary targets for trace level sensitivity. NEX CG II features a unique and improved close-coupled Cartesian Geometry optical kernel that dramatically increases signal-to-noise ratio and delivers enhanced elemental analysis.

Unlike conventional EDXRF spectrometers, NEX CG II is an indirect excitation system using secondary targets rather than tube filters. Monochromatic and polarized excitation from secondary targets vastly improves detection limits for elements in highly scattering matrices like water, hydrocarbons, and biological materials. Secondary target excitation in full 90° Cartesian Geometry eliminates background noise. As a result, NEX CG II brings a new level of analytical sensitivity to XRF technology. Users can measure ultra-low and trace element concentrations, even in challenging sample types.

NEX CG II achieves this superior analytical power with a 50 kV 50 W end-window palladium-anode X-ray tube, five secondary targets covering the complete elemental range sodium through uranium (Na – U), and a high-throughput large-area silicon drift detector (SDD). This unique optical kernel, combined with Rigaku’s advanced RPF-SQX Fundamental Parameters software, delivers the most sensitive EDXRF measurements in the industry.



NEX CG II



RPF-SQX Reduces the Need for Standards

Advanced qualitative and quantitative analysis is powered by Rigaku’s RPF-SQX Fundamental Parameters (FP) software, featuring Rigaku Profile Fitting (RPF) technology and Scattering FP. This robust integrated software allows semi-quantitative analysis of almost all sample types without standards — and rigorous quantitative analysis with standards. Rigaku’s Scattering FP method automatically estimates the concentration of unmeasurable low atomic number elements (H to F) and provides appropriate corrections.

Calibration standards can be expensive and difficult to obtain for many applications. With RPF-SQX, the number of required standards is greatly reduced, significantly lowering the cost of ownership and reducing workload requirements for running routine analyses.



Rigaku NEX CG II Application Reports

From oils and liquids to solids, metals, polymers, powders, pastes, coatings, and thin films, the NEX CG II delivers rapid qualitative and quantitative determination of major and minor atomic elements in a wide variety of sample types.

Click to view NEX CG II Application Reports ‣

Typical uses of XRF include the analysis of petroleum oils and fuel, plastic, rubber and textiles, pharmaceutical products, foodstuffs, cosmetics and body care products, fertilizers, geological materials, mining feeds, slags and tails, cement, heat-resistant materials, glass, ceramics, catalysts, wafers; the determination of coatings on paper, film, polyester; metals and alloys, glass and plastic; forensics; multi-layer thin films on silicon wafers, photovoltaics and rotating storage media as well as pollution monitoring of solid waste, effluent, cleaning fluids, pools and filters. In addition, X-ray Transmission (XRT) process gauges are employed to measure sulfur (S) in crude oil and marine bunker fuel.

XRF spectrometers are the elemental analysis tool of choice for many applications. They are smaller, simpler in design, and cost less to operate than other technologies like inductively coupled plasma optical emission spectroscopy (ICP-OES) and atomic absorption (AA) or atomic fluorescence (AF) spectroscopy. Examples of some common EDXRF applications are: Cement and raw meal: sulfur, iron, calcium, silicon, aluminum, magnesium, etc; Kaolin clay: titanium, iron, aluminum, silicon, etc; Granular catalysts: palladium, platinum, rhodium, ruthenium, etc; Ores: copper, tin, gold, silver, etc; Cement and mortar fillers: sulfur in ash; Gasoline, diesel and RFG: sulfur, manganese, lead, etc; Residual gas oils: sulfur, chlorine, vanadium, nickel, etc; Secondary oil: chlorine, etc; Kerosine, naphtha: sulfur, etc; Crude oil and bunker fuels: sulfur, vanadium, nickel, etc; Plating, pickling & pre-treatment baths: gold, copper, rhodium, platinum, nickel, sulfates, phosphates, chlorides, etc; Acetic acid: magnesium, cobalt and bromine; Terephthalic acid (TPA): cobalt, manganese, iron, etc; Dimethyl terephthalate (DMT): heavy metals; PVC copolymer solutions: chlorine; Photographic emulsion: silver; Clay: metals and non-metals; Waste and effluent streams: RCRA metals, chlorides, phosphates, etc; Food, pet food and other animal feed: potassium, phosphorus and chlorine; Cosmetics: zinc, titanium, calcium, manganese, iron, silicon, phosphorus, sulfur, aluminum, and sodium; Wood treatment: CCA, Penta, ACQ, ACZA, phosphorus-based fire retardants, copper naphthanate, zinc napthanate, TBTO, IPBC and combinations of these; Antacids: calcium; and Toothpaste: phosphorus and tin.


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