论文部分内容阅读
利用微波消化、电感耦合等离子体光谱法(ICP-AES)对稻米中20种无机元素进行了同步定量测定。微波消化与常规温消化法相比较,结果无显著差异。20种元素的平均检出限为0.0426μg/g,回收率在85～104%之间,变异系数平均为1.62%;与NBS等标准物进行了对比,显示出准确度、精密度、灵敏度均较理想。分析测定了51个优质米,结果表明符合质控要求。本方法消化样品快速、完全、污染少,仪器测定灵敏度高、重演性好,适合于稻米及其它生物、环境样品中无机元素含量的检测。
The simultaneous determination of 20 inorganic elements in rice by microwave digestion and inductively coupled plasma-atomic emission spectrometry (ICP-AES) was carried out. There was no significant difference between the results of microwave digestion and routine digestion. The average detection limits of the 20 elements were 0.0426 μg / g and the recoveries were between 85 and 104%, with an average coefficient of variation of 1.62%. Comparing with NBS and other standards, the results showed that the accuracy, precision and sensitivity More ideal. 51 high-quality rice were analyzed and determined, which showed that they met the quality control requirements. The method has the advantages of rapid and complete digestion samples, less pollution, high sensitivity and repetitiveness, and is suitable for detecting inorganic elements in rice and other biological and environmental samples.