Determination of substances characteristic of green and black tea Part 1: Content of total polyphenols in tea Colorimetric method using Folin-Ciocalteu reagent

Amended by

ISO 14502-1:2005/Cor 1:2006

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Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Published date

16-03-2005

Publisher

International Organization for Standardization

ISO 14502-1:2005 specifies a method for the determination of the total polyphenol content of leaf teas and instant teas by a colorimetric assay using Folin-Ciocalteu phenol reagent. It is applicable to both green and black tea products.

DevelopmentNote	Supersedes ISO/DIS 14502-1 (03/2005)
DocumentType	Standard
Pages	10
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
DIN ISO 14502-1:2007-11	Identical
NEN ISO 14502-1 : 2005 C1 2006	Identical
GOST R ISO 14502-1 : 2010	Identical
BS ISO 14502-1:2005	Identical
IS 17804 : Part 1 : 2022	Identical

ISO 3720:2011	Black tea Definition and basic requirements
BS ISO 11287:2011	Green tea. Definition and basic requirements
BS ISO 3720:2011	Black tea. Definition and basic requirements
UNE 84676:2017	Cosmetic raw materials. Plant extracts. Grape seeds powder extract (Vitis vinifera L.)
ISO 11287:2011	Green tea Definition and basic requirements

ISO 7516:1984	Instant tea in solid form Sampling
ISO 1839:1980	Tea — Sampling
ISO 7513:1990	Instant tea in solid form Determination of moisture content (loss in mass at 103 degrees C)
ISO 5725-2:1994	Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 3696:1987	Water for analytical laboratory use — Specification and test methods
ISO 1572:1980	Tea Preparation of ground sample of known dry matter content

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ISO 14502-1:2005

Determination of substances characteristic of green and black tea Part 1: Content of total polyphenols in tea Colorimetric method using Folin-Ciocalteu reagent

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