X射线荧光光谱法快速检测食品中的二氧化钛

Rapid determination of titanium dioxide in food by X-ray fluorescence spectrometry

中文关键词:  X射线荧光光谱  二氧化钛  快速检测方法

英文关键词:X ray fluorescence spectrum  titanium dioxide  rapid detection method

中文摘要:

      目的 建立X射线荧光光谱法测定面粉、糖果、果冻、鱼丸等食品中二氧化钛的快速检测方法。 方法 针对不同的食品形态, 分别探究干燥后粉碎、加入稀释剂粉碎、均质、加稀释剂均质4种制样模式, 选定引入稀释剂改善制样均匀性, 应用内标元素Nd校正基体和水分散失带来的影响。结果 建立的二氧化钛快速检测方法线性良好, 适用于市面上各种食品。应用本法对市面上可能含有二氧化钛的面粉、糖果、蜜饯、果冻、鱼丸样品各10份进行筛查, 发现除一份鱼丸超范围使用食品添加剂二氧化钛外, 其余39份食品二氧化钛均满足国家标准要求。结论 本方法操作简单, 分析速度快, 适合批量食品中二氧化钛的快速检测。

英文摘要:

      Objective To establish a rapid determination method of titanium dioxide in flour, candy, jelly, fish ball and other food by X-ray fluorescence spectrum. Methods According to different food, four sample pretreatments were tried, grinding after drying, grinding with diluent, homogenizing and homogenizing with diluent. Finally, diluent was selected to improve the uniformity of sample preparation, and internal standard element Nd was used to correct the influence of matrix and water loss. Results The established rapid detection method of titanium dioxide had good linearity and was suitable for all kinds of food in the market. This method was used to screening 10 copies of each sample including titanium dioxide inflour, candy, candied fruit, jelly and fish ball. The results of the screening was that a fish ball was found using titanium dioxide as a food additive, and the remaining 39 samples of food titanium dioxide all met the requirements of national standards. Conclusion This method is simple, rapid and suitable for the rapid detection of titaniumin bulk food.