保健食品中的六价铬测定
Determination of Hexavalent Chromium in Health Foods
-
摘要: 采用碱性溶液稳定并提取保健品中的六价铬,在阴离子色谱柱上进行分离,用ICP-MS对六价铬进行检测。对保健奶粉、营养冲剂、保健饮品等样品进行了试验,线性相关系数大于0.999,精密度RSD<10%,回收率在80%~110%之间,最低检出限为0.2 μg•L-1。该方法简便快速,具有较强的定性能力。Abstract: Hexavalent chromium was extracted from the health foods sample with alkaline solution. The extract was determined by IC-ICP-MS. The parameters of health milk powder, nutritional drink powder and healthy beverage were acquired. The linear correlation coefficient is greater than 0.999, the RSD of precision is less than 10%, the recoveries are in the range of 80%-110%, and the LOQ is 0.2 μg•L-1. The method is simple, quick and strong qualitative capability.