Determination of substances characteristic of green and black tea - Part 1: Content of total polyphenols in tea - Colorimetric method using Folin-Ciocalteu reagent (ISO 14502-1:2005 + Corrigendum 1:2006)
€69.91
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)
€91.03
Tea and instant tea in solid form - Determination of caffeine content - Method using high-performance liquid chromatography (ISO 10727:2002)
Methods of test for tea Classification grades by particle size analysis
€165.00
Analysis of tea and tea products - Determination of theobromine and coffeine content of fluid tea drinks - Part 1: HPLC-Routinemethod
€41.78
Tea - Determination of water extract (ISO 9768:1994)
Analysis of tea and tea products - Determination of theobromine and coffeine content of fluid tea drinks - Part 2: Especially for theobromine contents lower than 2 mg/l; HPLC-method
Thé et thé soluble sous forme solide - Détermination de la teneur en caféine - Méthode par chromatographie liquide à haute performance.
€28.00
Analysis of tea and products Tea instant tea. Determination caffeine content
Tea and instant tea in solid form - Determination of caffeine content - HPLC-method
Analysis of tea; determination of loss in mass of unground tea at 103 °C
Analysis of tea; preparation of ground sample of defined dry matter content
Tea; determination of water extract; identical with ISO 9768:1990
Thé. Détermination de l'extrait à l'eau.
€25.00
Method of test for tea. Determination water extract
