CT Associates provides R&D, testing and consulting services in a wide range of technical areas. Over the past 20 years, the staff has developed a strong reputation in the following areas of expertise:

Particles in high purity liquids and gases

Measurement of particle size and concentration in ultrapure water, concentrated acids and bases, solvents and aerosols.

Particles in solutions and suspensions

Measurement of size and concentration of particles in chemical-mechanical planarization (CMP) slurries, inks, emulsions, polishing slurries, and macromolecule solutions and virus suspensions.

Contamination control

Measurement of contaminant (inorganic, organic and particulate) extraction from components in high purity water, acids and bases.


Development of filters, filtration optimization in processes and equipment, and development of filter test methods.

Permeation and diffusion

Measurement of permeation rates and development of models to predict transport of gases through liquids and gases or liquids through polymers.

Performance and reliability testing

Measurement of component and equipment performance under simulated and accelerated use conditions in ultrapure water, aggressive chemicals or CMP slurries; life testing to determine failure mode and lifetime.