NEN-ISO 10727
Tea and instant tea in solid form - Determination of caffeine content - Method using high-performance liquid chromatography
inactive
| Organization: | NEN |
| Publication Date: | 1 August 1995 |
| Status: | inactive |
| Page Count: | 14 |
| ICS Code (Tea): | 67.140.10 |
scope:
The method specified is based on extracting the caffeine from a test portion with water at 90°C in the presence of magnesium oxide, filtration followed by determination of the caffeine content by HPLC with UV detection. Applies to teas and instant teas with a caffeine content of greater than 0,3% (m/m).
Document History
September 1, 2002
Tea and instant tea in solid form - Determination of caffeine content - Method using high-performance liquid chromatography
This International Standard specifies a method for the determination by high-performance liquid chromatography (HPLC) of the caffeine content of teas and instant teas. It is applicable to green tea,...
NEN-ISO 10727
August 1, 1995
Tea and instant tea in solid form - Determination of caffeine content - Method using high-performance liquid chromatography
The method specified is based on extracting the caffeine from a test portion with water at 90°C in the presence of magnesium oxide, filtration followed by determination of the caffeine content by...