DIN 10811-1:2000-09 Analysis of tea and tea products - Determination of theobromine and caffeine content of fluid tea drinks - Part 1: HPLC-Routine method
2000DIN 10811-1:2000-09 Analysis of tea and tea products - Determination of theobromine and caffeine content of fluid tea drinks - Part 1: HPLC-Routine method
2000DIN 10811-1:2000 Analysis of tea and tea products - Determination of theobromine and caffeine content of fluid tea drinks - Part 1: HPLC-Routine method