We provide testing services to certify product and materials compliance, support quality control, and ensure the health and safety of workers and their environment. We provide assistance for clients who are not sure what tests they need. Our accredited materials characterization laboratory is the foundation of all the services of RJ Lee Group provides, including standardized testing for compliance, industrial hygiene and environmental analyses, quality control, and materials research and development.

We provide credentialed expertise supported by robust scientific data. We provide significant support to industrial clients for product development, industrial hygiene and overall production support.

RJ Lee Group maintains a visible and respected reputation within the legal community, having offered scientific support in civil litigation matters for nearly 30 years. 

  • Product Liability 
  • Toxic Tort
  • Construction Defect
  • Fugitive Emission
  • Personal Injury
  • Patent Infringement
  • Contract Disputes
  • Insurance Subrogation

Subject Matter Experts

From our core business of providing scientific solutions to our clients, we have developed innovative products. Some are produced internally, and some have arisen from partnerships with other research organizations. 

For example, we build lab software solutions to help manage and streamline your labs data, and environmental testing products for a variety of applications. 

  • IntelliSEM is a powerful automated particle analysis system.
  • ParticleID is  a customizable cloud hosted web application used to identify foreign particulate matter and  assist with root cause investigations. 

Other products we create count particles and help keep the air and environment safe.

RJ Lee Group is a materials analysis laboratory and consulting company which serves many different industries. We offer scientific solutions such as industrial forensics services, laboratory and testing services, litigation support, and laboratory software to many industries:


What is the Difference Between XRD and XRF?

X-Ray Fluorescence (XRF) and X-Ray Diffraction (XRD) are two separate but complementary analytical techniques that use an X-ray source and detector. Both measure the sample’s response to the X-rays, but their measurements provide different, yet supplemental, information about the sample. XRF provides the elemental data and XRD provides mineralogical/crystallographic data. The accuracy of phase identification and quantification in a sample can be improved by using both techniques.


X-Ray Fluorescence (XRF) is a non-destructive analytical technique used to determine the elemental composition of materials. It identifies and quantifies elements by percentage or parts per million (ppm). XRF analyzers determine the chemistry of a sample by measuring the characteristic fluorescent (or secondary) X-rays emitted that are unique to each specific element. However, while this technique determines the elemental composition of the sample, it does not provide information about the element’s phases or polymorphs. Results for this technique are provided as a graphical output.

Applications for XRF analysis include use in cement manufacturing, mining, paints, chemicals, polymers, petroleum, metallurgy, and environmental and forensic investigations. Portable XRF analyzers are available and can be used in the field.


X-Ray Diffraction (XRD) is a nondestructive analytical technique that provides quantitative mineral phase analysis, including crystallography and the relative fraction of multiphases of materials. It can distinguish the major, minor and trace minerals present. The diffraction pattern produced when a crystalline material is analyzed reveals the material’s crystalline/lattice structure. Qualitative results can be obtained when the resulting diffraction pattern of an unknown sample is compared with a library of known patterns.

Applications for XRD analysis include crystallography, surface and thin film analysis, identification of phases in an unknown sample, and phase quantification of a known sample.


These two complementary techniques provide both qualitative and quantitative material characterization. They are used together in a variety of applications for elemental analysis, such as in mining and geology, in cement manufacturing, for sample identification, quality control, regulatory compliance, and environmental analyses.