SN/T 1852-2006
Determination of saponin content in tea saponin for export
GB/T 22996-2008
Determination of ginsenosides in ginseng - LC-UV method
NY/T 3675-2020
Determination of thearubigin and theabrownine in black tea-Spectrophotometry
GH/T 1260-2019
T/NAIA 0188-2023
T/SXSF 13-2025
T/GZTSS 1-2021
DIN 10810
Analysis of tea and tea products - Determination of theobromine and coffeine content of instant tea in solid form and instant tea products - HPLC-method
DIN ISO 14502-1
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)