摘要
建立了基于快速提取一铅镉专用检测仪测定大米中镉的分析方法。通过对样品粉碎度，质液比，提取液组成及浓度，提取方式及时间，质液分离方式及时间，仪器升温程序等方面进行方法优化。结果表明该方法检出限为0．025μg／L，定量限为0．08μg／L，与国标方法相比，相对误差在-3．85％-6．70％，加标回收率在92．0％-103．5％，精密度相对偏差为5．09％，台间差无显著性差异。完成一个样品（双实验）测定的时间少于15min。快速提取-铅镉专用检测仪测定大米中镉的方法，样品前处理简单，方法快速准确，适用于大米中镉的快速测定。
A rapid method for the determination of Cadmium in rice using was proposed by rapid extraction pretreatment method and direct sampling detection with Pb ＆ Cd Analyzer. Some factors ,such as the sample size, solid-liquid proportion, the kind of the extract solvent and concentration, the extraction pattern and time, the separation pattern and time of solid and liquid ,and the instrument conditions were optimized. The results indicated that the method detection limit is 0.025 μg/L and quantification limit is 0.08μg/L. Compared with the National standard-GB/T5009.15-2003, the RSD is -3.85%-6.70%, the average recoveries is 92.0%-103.5%. The precision of method is RSD= 3.09% and there is no difference between two instruments. The total time to test one sample （two parallel samples） was less than 15minutes.This method is rapid and accurate without complex sample pretreatment, and it is suitable for the rapid detection of rice samples.
出处
《现代科学仪器》
2016年第6期147-152,共6页
Modern Scientific Instruments
