摘要
研究了多巴胺与四氯苯醌间的荷移反应条件，测得络合物组成比为１：１，摩尔吸光系数ε＝１．６３×１０￣３。方法的相对标准偏差为１．２％（ｎ＝１０）。在６ｏ℃保温１ｈ形成粉红色络合物，λ＿（ｍａｘ）＝４８０ｎｍ，应用拟定的方法测定食品中多巴胺含量，回收率在９０％以上。
A spectrophotometric method for the determination of dopamine in food has been developed based on the charge transfer reaction. Beer's law was obeyed in the range of 0～0.064 g/L of dopamine.The molar absorptivity of complex at 480 nm was 1.63 × 10￣3.The standard deviation of ten determinations was 1.2%. The composition of the complex was found to be 1:1 by molar ratio and Job's method.The method has been applied to the determination of dopamine in banana and potato.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
1994年第4期425-428,共4页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金
关键词
分光光度法
多肥胺
测定
食品
charge transfer reaction
tetrachlorobenzquinone
spectrophotometry
dopamine determination
