2Central Science Laboratory. Food Analysis Performance Assessment Scheme (FAPAS) Protocol for the Organisation and Analysis of Data [R]. UK, 2002:34-36.
3FAO and WHO. Joint Fao/Who Food Standards Programme Codex Committee on Methods of Analysis and Sampling[R]. Hungary, 2002.
4Thompson M, Ellison S L R, Wood R.The International Harmonized Protocol for the Proficiency Testing of Analytical Chemistry Laboratories[J]. Pure Appl Chem, 2006,78( 1 ):45-196.
5Standards Councils Canada. Guidelines for the Recognition for Proficiency Testing Schemes[D]. CAN-P-1593, 2001.
6Voluntary Emc Laboratory Accreditation Center. General Requirements for the Laboratory Accreditation(Iso/Iec17025 Version)[S].2002.
7APLAC.Interpretation and Guidance on the Estimation of Uncertainty of Measurement in Testing[D]. 2003.
