新式干灰化-湿法消解ICP-MS测定食品中的二氧化钛  

New Dry Ashing-wet Digestion Method and ICP-MS Determine the Content of Titanium Dioxide in Foods

作　　者：张帅[1] 张文皓[1] 李宗芮[1] 江志刚[1] 王境堂[1] 梁凤丽[1] 

机构地区：[1]山东出入境检验检疫局,山东青岛266002

出　　处：《食品研究与开发》2013年第23期77-80,共4页Food Research and Development

摘　　要：采用新式干灰化＋湿法消解后，电感耦合等离手体质谱（ICP—MS）测定食品中钛元素的含量，继而计算求得二氧化钛含量。通过实验得出最佳灰化温度为450℃和最佳消解体系为4mL＋1．6gH2SO4＋（NH4）2SO4。研究结果表明，方法准确、快速、简便。方法的检出限为0．17mg／kg，回收率为90．0％-95．0％，精密度为3．6％。适用于大批量食品中二氧化钛的检测。With new dry ashing and wet digestion method, the content of titanium in the pretreated foofstuffs were determined by ICP-MS Octopole reaction system （ORS）.And then the content of titanium oxide were calculated. Studyed the optimum experimental condition of ashing and digestion. Kinetic energy discrimination （KED） and collision induced dissociation （CID） were used to eliminate the matrix effects and mass spectroscopy interference.The results showed that the method was accurate, rapid and simple. The lowest detection limit of titanium oxide was 0.17 mg/kg, the recoveries were in the range of 90 %-95 %, the precision was 3.6 %. The method is suitable for large quantities of detections of titanium oxide in food.

关 键 词：ICP—MS 二氧化钛 测定 

分 类 号：O657.63[理学—分析化学] TS207.5[理学—化学]