茶和茶制品检测
DIN 10811-1-2000茶和茶制品的分析.液体茶饮料中可可碱和咖啡因含量测定.第1部分:HPLC常规方法
The document specifies a method using high-performance liquid chromatography (HPLC) for the determination of theobromine and coffeine content of fluid tea drinks. The method is usable for tea drinks with a theobromine content higher than 2 mg/l.
DIN 10811-2-1997茶和茶制品分析.茶饮料中可可碱和咖啡因含量测定.第2部分:液体色谱分析比照法(亦适用于低含量可可因)
The document specifies a HPLC-method for the determination of theobromine and caffeine contents of fluid tea drinks. This method should be prefered for the determination of theobromine contents lower than 2 mg/l. For the determination of theobromine contents higher than 2 mg/l part 1 of DIN 10811 should be prefered.
