Profile: R.T. Corp is involved in the manufacture of certified reference materials, quality control samples and performance testing samples. In conjunction with the production of products, laboratory proficiency testing programs are conducted for both solids and waters. Our biological products include aquatic plants, dioxins and furans, fish samples, fruit samples, ground plants, land animals, PAHS, PCBs, pesticides, shellfish samples, tobacco samples, tree samples and vegetable samples.