DIN ISO 14502-2:2007
Determination of substances characteristic of green and black tea - Part 2: Content of catechins in green tea - Method using high-performance liquid chromatography (ISO 14502-2:2005 + Corrigendum 1:2006)
- Standard No.
- DIN ISO 14502-2:2007
- Release Date
- 2007
- Published By
- German Institute for Standardization
- Status
- Replace By
- DIN ISO 14502-2:2007-12
- Latest
- DIN ISO 14502-2:2007-12
- Replace
- DIN ISO 14502-2:2006
- Scope
- This part of ISO 14502 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(see Annex A). Gallic acid and caffeine can also be determined by this method ,as can theogalllin and theaflavins.
DIN ISO 14502-2:2007 Referenced Document
- ISO 1572 Tea; Preparation of ground sample of known dry matter content
- ISO 3696:1987 Water for analytical laboratory use; Specification and test methods
- ISO 7513 Instant tea in solid form — Determination of moisture content (loss in mass at 103 degrees C) AMENDMENT 1
DIN ISO 14502-2:2007 history
- 2007 DIN ISO 14502-2:2007-12 Determination of substances characteristic of green and black tea - Part 2: Content of catechins in green tea - Method using high-performance liquid chromatography (ISO 14502-2:2005 + Corrigendum 1:2006)
- 2007 DIN ISO 14502-2:2007 Determination of substances characteristic of green and black tea - Part 2: Content of catechins in green tea - Method using high-performance liquid chromatography (ISO 14502-2:2005 + Corrigendum 1:2006)
- 0000 DIN ISO 14502-2:2006
