微波等离子体炬原子发射光谱法测定米粉中微量元素——一个大学化学仪器分析实验的设计与实践

冯国栋,宋志光,郭玉鹏

Determination of Trace Elements in Rice Flour Using Microwave Plasma Torch-Atomic Emission Spectrometry:Design and Practice of a College Chemistry Experiment of Instrumental Analysis

Guo-Dong FENG,Zhi-Guang SONG,Yu-Peng Guo

表1 大米粉(1568)标准样品的检测结果

元素 λ/nm 测量值/(μg·g-1) 标准值/(μg·g-1) 误差/% Ca 393.336 135 140 ± 20 -3.6 Cu 324.754 2.1 2.2 ± 0.3 -4.5 Fe 344.061 9.0 8.7 ± 0.6 +3.4 Mn 257.610 20.8 20.1 ± 0.4 +3.5