液相色谱法检测鱼类肝脏中天然维生素ADetermination of natural vitamin A in fish liver by liquid chromatography

Abstract

为了准确测定鱼类肝脏中维生素A（维生素A1、维生素A2）含量，对样品预处理方法（水浴皂化法、室温皂化法、直接提取法）和检测方法（正相色谱法、反相色谱法）进行筛选，并应用于9种经济鱼类肝脏中维生素A的测定。结果表明：维生素A1、维生素A2标准品用反相色谱法检测分离效果良好，且在各自线性范围内线性关系良好，R2均大于0.99；水浴皂化法维生素A含量显著高于室温皂化法及直接提取法（p 0.99); the content of vitamin A extracted by water bath saponification was significantly higher than that by room temperature saponification and direct extraction (p<0.05), and its average recoveries of vitamin A1 and vitamin A2 were 104.52% and 90.94%, respectively. Except for the freshwater snakehead and big mouth bass, the total content of vitamin A in the livers of other freshwater fishes and marine fishes was more than 200 μg/100 g, and the total content of vitamin A in the liver of marine giant grouper was the highest, reaching 14 413.78 μg/100 g. The water bath saponification method combined with reversed phase chromatography has good precision and is suitable for the determination of vitamin A in fish liver.

Keywords

• 鱼；肝脏；维生素a；提取方法；检测方法
• fish; liver; vitamin a; extraction method; detection method