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 built 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:

Exposing Nanoparticles – It’s Gotten Personal

RJ Lee Group News

April 22, 2014

Nanoparticles, microscopic particles with at least one dimension less than 100 nm, are a part of everyone’s daily life. You don’t have to be involved in their manufacture to be exposed to nanoparticles. Walking down the street we are exposed to vehicle exhaust (man-made nanoparticles); while on vacation at the beach everyone has come in contact with sea spray (naturally occurring nanoparticles). Smoke from a wildfire is another instance where we can be exposed to nanoparticles and we are all using products that contain engineered nanoparticles such as toothpaste, cosmetics or sunscreen. Interest in human exposure to airborne nanoparticles has grown along with the growth of nanotechnology and the potential risks associated with inhalation of nanoparticles are being evaluated by health effects experts.

The Thermophoretic Particle Sampler

Of increasing concern is exposure to engineered nanoparticles (ENP) that are specifically designed for use in the nanotechnology sector. Identifying ENP and quantifying their contributions to human exposure are important from the standpoints of source attribution and risk assessment. Effective assessment of nanoparticle exposures requires detailed characterization of the aerosol. In the article, “Development of a Transfer Function for a Personal, Thermophoretic Nanoparticle Sampler,” (David Leith, Dan Miller-Lionberg, Gary Casuccio, Traci Lersch, Hank Lentz, Anthony Marchese and John Volckens (2014), Aerosol Science and Technology), the authors describe the operation and use of a nanosampler that uses thermophoretic force to collect nanoparticles onto a standard TEM (transmission electron microscope) grid. The grid is subsequently analyzed using electron microscopy techniques to characterize and speciate the particles.

TPS nanoparticle personal sampler

The thermophoretic sampler’s self-contained, compact design makes it useful for numerous applications including personal sampling.

In the article, the authors describe a second-generation TPS along with the development of a transfer function that expresses the relationship between measurements (number concentration and size distribution) made using a scanning mobility particle sizer (SMPS) to the particles collected with the TPS. Based on the authors’ knowledge, this is the first thermophoretic sampling device that is fully self-contained (e.g., precipitator, battery, pump, flow control, etc.) and is sufficiently compact and light weight that it can be used in numerous applications including personal sampling.

Presently, field studies using the TPS are being conducted with government agencies (NIOSH, EPA, NASA) and industry to investigate TPS performance in real-world conditions.

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