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:

TPS100 Nanoparticle Sampler

The TPS100 nanoparticle sampler collects airborne particles directly on an electron microscope (EM) grid which can be analyzed directly (no preparation required) using a high resolution EM to obtain detailed characterization of airborne nanoparticles. The TPS100 is the first fully self-contained, handheld thermophoretic sampling device on the market.

Nanoparticles are ubiquitous in the atmosphere, and exposure to both naturally-occurring, combustion related and engineered nanoparticles (ENP) is a growing concern with respect to public health and impact on the environment. Detailed characterization and speciation of airborne nanoparticles is a critical component to an effective assessment of exposure. RJ Lee Group, in collaboration with Colorado State University, has developed the TPS100, a sampler based on the principle of thermophoresis, or thermal precipitation. Thermophoresis is when an internal temperature gradient creates a force that drives particles to the EM grid, independent of the sampler’s orientation.

Although the TPS100 is a recent innovation, early adopters of this unique technology include government agencies including NIOSH, EPA, NASA, and the Oak Ridge National Laboratory (ORNL). Projects to date include the evaluation of cerium particles in diesel fuel emissions; investigation of siloxane in the atmosphere; characterization of secondary organic aerosols; evaluation of emissions from 3D printing; characterization of aerosols released from composite nanomaterials; assessment of the release of nanocellulose from a production process; characterization of combustion (see image right); and a study of the release of ultrafine metal particles from commercial products with small electric motors. In addition, the TPS100 was selected by NASA for an experiment on the International Space Station.

Read the TPS100 User Manual.

Publications and Presentations

Performance of a Personal Thermal Precipitator to Assess Nanoparticle Exposures’, presented at the 32ND Annual Conference of American Association for Aerosol Research (AAAR), October 2013.

Development of a Transfer Function for a Personal, Thermophoretic Nanoparticle Sampler’ published in Aerosol Science and Technology in January 2014.

Development of a Nanoparticle Sampler for Particle Speciation Using Electron Microscopy’, presented at the QEEN Workshop: Quantifying Exposure to Engineered Nanomaterials (QEEN) from Manufactured Products, Sponsored by CPSC in collaboration with the National Nanotechnology Initiative (NNI), July 2015. Click to view the Final Workshop Report.

Sampling Indoor Aerosols on the International Space Station’, presented at the 34TH Annual Conference of American Association for Aerosol Research (AAAR), October 2015.

‘Investigation of Airborne Particulate Matter on the International Space Station (ISS) using a Thermophoretic Sampler (TPS)’, presented at the American Industrial Hygiene Conference and Expo (AIHce) May 2016. Click here for abstract.

Upcoming Presentations Related to the TPS100

Development of an Analytical Methodology for Measurement of Aerosol Debris Generated from Sanding of CNT Composite Materials’, 35th Annual Conference of American Association for Aerosol Research (AAAR), October 2016.

Update on Aerosol Sampling Experiment on the International Space Station‘, 35th Annual Conference of American Association for Aerosol Research (AAAR)’, October 2016.