AOAC
AOAC INTERNATIONAL is an association of scientists in the public and private sectors devoted to the validation
of chemical and microbiological analytical methods and promotion
of quality measurements in the analytical sciences.
IUPAC
International Union of Pure and Applied Chemistry.
PAHO/OPS
The Pan American Sanitary Bureau is the Secretariat of the Pan American Health
Organization (PAHO) is an international agency specializing in health. The site is in
English and Spanish.