摘要
采用微波消解处理样品,以电感耦合等离子质谱(ICP–MS)法同时测定砖茶中的铅、铜、铬和16种稀土元素。采用外标法绘制校准曲线,分析了茶叶国家标准物质GBW 10016,测定值与标准值吻合。检出限为0.055～0.765μg/kg,样品测定结果的相对标准偏差为0.2%～4.7%(n=6)。用加标回收的方法评价了该方法的准确性,回收率为88.0%～102.7%。该方法测定结果与电热板湿法消解前处理测定结果相比差异不显著。
A method was studied for the analysis of lead, copper, chromium and 16 rare earth elements （REEs） in brick tea by using microwave digestion and ICP-MS. The determination results of tea national standard material（GBW10016） analyzed by this method were consistent with its standard values. The method detection limits for these elements were 0.055-0.765 μ g/kg. The relative standard deviations of determination results were 0.2%.4.7%（n=6） and the recoveries were 88.0%-102.7%.
出处
《化学分析计量》
CAS
2012年第2期75-77,共3页
Chemical Analysis And Meterage
