首页> 中文期刊> 《色谱》 >高效液相色谱-蒸发光散射法测定食品中的单糖、双糖、低聚果糖和糖醇

高效液相色谱-蒸发光散射法测定食品中的单糖、双糖、低聚果糖和糖醇

         

摘要

A simple and efficient method was established based on high performance liquid chromatography (HPLC) to separate and detect thirteen analytes of monosaccharides,disaccharides,oligosaccharides and sugar alcohols (xylose,fructose,glucose,sucrose,maltose,lactose,1-kestose,nystose,1F-fructofuranosyl nystose,erythritol,mannitol,xylitol,maltitol)in foods.The separation was performed on an NH2 column with the gradient elution of acetonitrile-water as the mobile phases.The analytes were detected by an evaporative light-scattering detector (ELSD).All the thirteen sugars had good linearities within 0.1-5 g/L with the correlation coefficients between 0.990 1-0.999 6.The limits of detection (LOD) were all less than 0.1 g/L.The precisions of the method expressed as RSDs were in the range of 2.69%-7.21%.The recoveries of the thirteen analytes spiked in real samples ranged from 96.1% to 105.2%.This method was applied to the actual sample testings and the results showed the food labels were greatly different from the actual compositions.%建立了食品中常用的木糖、果糖、葡萄糖、蔗糖、麦芽糖、乳糖、蔗果三糖、蔗果四糖、蔗果五糖、赤藓糖醇、木糖醇、甘露糖醇、麦芽糖醇等13种单糖、双糖、低聚果糖和糖醇的高效液相色谱同时分离检测的方法.该法采用NH2色谱柱,以乙腈-水为流动相梯度洗脱,蒸发光散射检测器检测;13种糖在0.1~5 g/L内均具有良好的线性关系,检出限均在0.1 g/L以下,精密度(RSD)为2.69% ~ 7.21%,回收率为96.1%~105.2%,结果较为理想.将该法用于实际样品检测,结果显示食品标签明示和实际成分相差较大.

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