表面增强拉曼光谱法快速测定干果类食品中的糖精钠

建立了干果中糖精钠的表面增强拉曼光谱(SERS)快速分析方法。干果样品经水提取、C18固相萃取柱净化除杂后进行表面增强拉曼光谱分析。该方法的线性范围为50.0~250 mg/L,检出限为0.6 g/kg,回收率为80.0%~125%,相对标准偏差(RSD,n=5)不大于8.4%。结果表明该方法灵敏度高、杂质干扰小、准确度高,满足干果类食品中糖精钠的快速检测要求,在干果类食品安全质量监控方面具有良好的应用潜力。

Rapid Analysis of Saccharin Sodium Salt in Dried Fruits by Surface-enhanced Raman Scattering Spectroscopy

A rapid analytical method was developed for the determination of saccharin sodium salt in dry fruits by surface-enhanced Raman spectroscopy(SERS).The saccharin in real samples was extracted with water, followed being separated and cleaned up on the activated C18 solid phase extraction column before surface-enhanced Raman scattering measurement.The linear range of this method was from 50.0 mg/L to 250 mg/L,and the detection limit was 0.6 g/kg.The good recoveries were in range of 80.0%-125% with relative standard deviations(RSD,n=5) no more than 8.4%.The results suggested that this method, with good anti-interference capability, was sensitive and reliable in the rapid determinattion of saccharin sodium salt in dry fruits.It is expected that this SERS based rapid analytical method possesses a great potential in monitoring the quality of dry fruits.