The XL-700series is NITON's family of multi-element analyzers. They perform testing for 15 to 25 elements depending on what radioactive sources are used in the device.
NITON is pleased to announce the release of EPA Method 6200 for XRF testing of metals in soils and sediments. This method is now part of SW-846, the library of standard EPA methods under RCRA.
There are several models and radioactive sources to choose, including many customized applications. The XL-700series is divided into two distinct groups of analyzers. Any one can be converted to the other at any time, making the XL-700series the perfect tool for most companies and consultants. You pay for only what you need, and when you need additional features the instrument can always be upgraded.
Models Available for XL-700series:
Model XL-701 or XL-721:
These are the single source (701) or dual source (721) models for many thin sample applications. Thin sample means air filters, dust wipes, or coatings residing on top of substrates. In terms of x-ray physics, thin sample mode assumes the x-rays produced by the elements of interest are not attenuated significantly by materials between the sample and detector. For example, one NITON customer tests plant leaves for uranium and lead contamination. They use thin sample mode, because the L-shell x-rays from these elements are not significantly absorbed by the plant leaf material before reaching the detector. Another example is cadmium in paint detection. Provided the cadmium is in the top layers of paint, thin sample mode is ideal for this problem. If the cadmium is covered by several layers of other paints, the cadmium K-shell x-rays will be somewhat shielded by these coatings. The XRF will underestimate the amount of cadmium in this case, unless special correction algorithms are employed. Please contact NITON technical sales at any time to discuss your application.
Model XL-702 or XL-722:
These are the single and dual source models for samples where the contamination permeates the entire sample matrix. Good examples are soils and sediments, or even liquids, since the elements being measured are not on the surface of the sample, but are found throughout the sample matrix. XRF analysis of these types of samples requires two key assumptions:
1. The contamination is uniform throughout the sample
2. The average size of particles that comprise the sample is small
The closer the actual sample matches this model sample, the more accurate the XRF analysis. In the real world, samples often do not meet this criteria. Fortunately many samples can be prepared and made more uniform, and finer in particle size (i.e. more powdery). Examples of samples analyzed with 702/722 software are soils and sediments. Building materials can be analyzed for contamination, provided the contamination is part of the sample matrix. The Dept. of Energy uses the 702 to analyze for uranium in concrete for reactor decommissioning, since the uranium usually has migrated into the concrete, rather than residing on the surface. For specific application discussions, please contact NITON technical sales.
Model XL-703 or XL-723:
This model has both sets of software - thin sample analysis and bulk sample analysis. Customers with either the 701/721 or 702/722 can upgrade to the additional set of software at any time. Customers with the single source instrument 701/702/703 can also add a second radioactive source at any time.
Custom Applications: The NITON XRF instruments were developed specifically for environmental and metal-alloy analysis applications. However, because these instruments are sensitive to a variety of elements, many custom applications are possible. Please contact NITON via telephone or e-mail to discuss a custom application, delivery time, pricing and performance. To determine the optimal radioactive source, please refer to the "Radioactive Source Selection Guide" accessible below. Several examples of custom application developments are briefly described:
Ruthenium and platinum detection for catalyst industries. NITON has provided Model XL-701 units with custom calibrations for ruthenium and platinum. The application requires a measurement of the amount of a pure ruthenium or platinum coating on top of a metal substrate. The 701 was chosen since this type of application satisfies the criteria of a thin sample.
Detection of Rare Earth Metals. NITON is developing custom calibration software for several industries interested in detecting rare earth metals including yttrium, gadolinium, lanthanum in a variety of thin sample matrices.
Detection of Trace Metals in Gases for the Semi-conductor Industry. NITON is developing an on-line system to measure trace levels of impurity metals, such as iron and copper, in gases used during semi-conductor fabrication.
Mining and Prospecting. NITON has provided ModeL-702 instruments with custom calibrations for tantalum and columbium to the mining industry for rapid, on-the-spot analysis of rock and core samples. This reduces the need to take samples to the surface for laboratory analysis, saving time and money.
Organic bromine compounds in air. NITON has provided a large pharmaceutical company with special calibrations to detect airborne organic bromine compounds for industrial hygiene purposes.
NITON Radioactive Source Selection Guide
NITON Model XL-701 Thin Sample Analyzer
NITON Model XL-702 Bulk Sample Analyzer
NITON Models XL-721 and XL-722 Dual-Source Analyzers