Transcription of ISO Standards for Tea
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ISO Standards for Tea
1 ISO Standards for TeaIntergovernmental Group-on Tea10thSessionNew Dehli, 12-14 May 2010 Andrew Scott, Chairman ISO TC/34 SC 8 Tea23 Over3milliontonnesproducedInover30countr iesProvidingover1000billioncupsofteaTea4 International Standards are vital to facilitate international tradeTo ensure consumer expectations are metTo provide guidance and common understanding of Good Manufacturing practices via compositional specificationsTo provide validated methods of analysisInternational Standards for Tea51970 s-TeaCommitteebecameISOW orkingGroup8-ISOT echnicalCommittee34 Sub-committee8 Tea1977-ISO3720 Blackteastandard8testingmethodstomeasure basicteaparameters1980-ISO1839
Statistical methods: Cochrane test (duplicates), Dixon test (between laboratories), Friedman test (consistent highs/lows) Relative response factor relative to caffeine std (more convenient retention time than gallic acid) Standard purity assessments [ HPLC, NMR, moisture] Measuring …
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