ISO 14502-2:2005
Current
The latest, up-to-date edition.
Determination of substances characteristic of green and black tea Part 2: Content of catechins in green tea Method using high-performance liquid chromatography
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16-03-2005
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ISO 14502-2:2005 specifies a high-performance liquid chromatographic (HPLC) method for the determination of the total catechin content of tea from the summation of the individual catechins. It is applicable to both leaf and instant green tea, and with precision limitations to black tea.
Gallic acid and caffeine can also be determined by this method, as can theogallin and theaflavins.
| DevelopmentNote |
Supersedes ISO/DIS 14502-2 (03/2005)
|
| DocumentType |
Standard
|
| Pages |
23
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Standards | Relationship |
| GOST ISO 14502-2 : 2015 | Identical |
| NEN ISO 14502-2 : 2005 C1 2006 | Identical |
| IS 17804 : Part 2 : 2022 | Identical |
| DIN ISO 14502-2:2007-12 | Identical |
| NEN ISO 14502-2 : 2005 | Identical |
| BS ISO 14502-2:2005 | Identical |
| BS ISO 11287:2011 | Green tea. Definition and basic requirements |
| 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 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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