The American Chemical Society
American Chemical Society www.acs.org

ANSI
American National Standards Institute (ANSI) www.ansi.org

ASTM
American Society for Testing and Materials (ASTM) www.astm.org

ASQC
American Society of Quality Control (ASQC) www.asq.org

AOAC
Association of Official Agricultural Chemists www.aoac.org

EOTC
Avaliação da Conformidade European Organization for Testing and Certification

BIPM
Bureau International des Poids et Mesures www.bipm.fr

CAS
Chemical Abstracts Service (CAS) www.cas.org

COMAR
COMAR – The Database for Certified Reference Materials www.bam.de

CCQM
Comitê Consultivo para Quantidade de Matéria Substance – CCQM www.bipm.fr

CITAC
Co-Operation on International Traceability in Analytical Chemistry – CITAC www.irmm.jrc.be