【摘要】 采用HNO3-HClO4(3.5∶1)混酸作消化液,在常压微沸条件下消解百合样品,应用火焰原子吸收光谱法测定了兰州百合中的Zn,Fe,Cu,Mn,Co,Pb,Cd和Cr共8种元素的含量。研究了测定不同元素的仪器最佳工作条件,确定了合适的样品消化体系,考察了干扰情况、方法的准确度和精密度。在选定的实验条件下,百合中各元素间相互不干扰,可在同一份制备液中进行8种元素的分别测定。实验表明,兰州百合中含有丰富的Zn,Fe,以及Cu,Mn,有害元素Pb和Cd未检出。方法的加标回收率为94.20%~111.20%,RSD≤2.54%(n=6),测定结果准确可靠。更多还原

【Abstract】 The contents of eight microelements (Zn, Fe, Cu, Mn, Co, Pb, Cd and Cr) in Lanchow lily were determined by using flame atomic absorption spectrometry with the mixed acid of HNO3-HClO4(3.5∶1) as the digesting solution and the sample of lily being dissolved under the circumstance of normal pressure and little boil. The optimal working conditions of the instruments used to determine the different elements were studied. The proper sample digestion system was determined. The disturbance, accuracy and precision of the method were examined. The elements in lily did not interfere with each other under the given experimental condition, so the authors can examine the eight elements in the same preparation solution. The experimental result indicates that there are abundant Zn, Fe, Cu and Mn in the Lanchow lily, but there are no harmful elements Pb and Cd. The recovery and relative standard deviations are 94.20%-111.20% and 2.45%(n=6), respectively. The result is accurate and reliable.更多还原