NIST Traceable Particle Size Standards
Certified Particle Size Standards from Thermo Scientific enable laboratories to demonstrate the traceability of their analytical methods, as required by ISO 9000, ISO/DIS 10012, ANSI/NCSL Z540, GMP/GLP and other standards and regulations. They provide third party traceability of calibration procedures to national or international agencies through an unbroken chain of measurements with specified uncertainties. The products are also used to develop and test new analytical instruments for particle size characterization or for particle contamination analysis.
They are available as uniform spheres of polymer, glass or silica in a range of discrete sizes from 20 nanometers (nm) to 2000 micrometers (μm or microns). Spheres are used instead of irregularly shaped particles to minimize shape effects on the response of analytical systems. The spheres are calibrated with linear dimensions transferred from the National Institute of Standards and Technology (NIST) by Duke Scientific using methods developed in the company's laboratories. The calibrated dimensions are traceable through NIST to the International Standard Meter. Each package of Duke standards contains a Certificate of Calibration and Traceability, a description of the calibration method and its uncertainty, a table of chemical and physical properties, and a Material Safety Data Sheet (MSDS) with handling and disposal instructions. Packages are also lot-numbered for after-sale service and technical support.