电感耦合等离子体质谱法测定食品中 二氧化钛的含量
目的 优化电感耦合等离子质谱法测定二氧化钛的含量。方法 样品前处理先通过硫酸湿法消解, 放冷后再用加入30%过氧化氢继续消解, 用电感耦合等离子质谱法测定二氧化钛中钛含量, 根据质量分数计算出二氧化钛含量。结果 通过比较微波消解、湿法消解、干灰化法消解和压力消解4种前处理方式, 采用硫酸-双氧水的消解体系进行湿法消解。钛在0~50 μg/mL范围内线性关系良好, 相关系数为1.0000。在50、75和100 g/100 mL 3个加标浓度下, 样品的平均回收率为101.26%, 平均相对标准偏差为2.8%。结论 该方法简便、快捷, 有较高的灵敏度、准确度、精密度, 适合食品中二氧化钛含量的测定。
Objective To Optimize the method of inductively coupled plasma mass spectrometry (ICP-MS) for determination of titanium dioxide. Methods The pretreatment of the sample was followed by digestion with sulfuric acid and then quenched by the addition of 30% hydrogen peroxide. The titanium content of titanium dioxide was determined by ICP-MS, and the content of titanium dioxide was calculated according to the mass fraction. Results The wet digestion with the sulfuric acid-hydrogen peroxide digestion system was carried out after comparison of microwave digestion, wet digestion, dry desiccation digestion and pressure digestion. The linearity of titanium was good in the range of 0~50 μg/mL, with correlation coefficient of 1.0000. The average recovery was 101.26% with relative standard deviation of 2.8% when spiked at 50, 75 and 100 g/100 mL. Conclusion The method is simple, rapid, sensitive, which is suitable for determination of titanium dioxide in food.
标题：电感耦合等离子体质谱法测定食品中 二氧化钛的含量
英文标题：Determination of titanium dioxide in food by inductively coupled plasma mass spectrometry
作者：
欧阳超 汤臣倍健股份有限公司
陈均洪 汤臣倍健股份有限公司
刘慧堂 汤臣倍健股份有限公司
中文关键词:电感耦合等离子体质谱法,二氧化钛,硫酸-双氧水,
英文关键词:inductively coupled plasma mass spectrometry,titanium dioxide,sulfuric acid-hydrogen peroxide,
发表日期：2017-03-23
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