原子吸收光谱法测定莲子和莲子心中7种金属元素含量

Determination of Seven Metal Elements in Lotus Seed and Plumula Nelambinis by Atomic Absorption Spectrometry

摘要: 利用火焰原子吸收光谱法测定6种不同产地的湘莲莲子和莲子心中7种金属元素含量. 莲子和莲子心样品经粉碎干燥后, 用硝酸-高氯酸混合液进行消解处理,采用火焰原子吸收光谱法测定样品中Cr、Cu、Zn、Fe、Mn、Pb、Cd的含量. 莲子和莲子心中富含微量元素Fe、Mn、Zn、Cu、Cr,有害金属元素Pb和Cd未检出. 各元素的加标回收率为98.58%~101.53%,RSD在0.78%~1.89%之间. 方法快速、简便、灵敏,结果准确可靠,为莲子和莲子心中金属元素含量测定提供了一种可靠的方法.

Abstract: The content of seven metal elements in Lotus seed and Plumula Nelambinis from 6 different growing areas were determined by Flame Atomic Absorption Spectrometry(FASS). Lotus seed and Plumula Nelambinis were ground and dried, and then were digested by mixtures of HNO₃ and HClO₄ by wet digestion.The contents of Fe、Mn、Zn、Cu、Cr、Pb and Cd were determined by FAAS. Lotus seed and Plumula Nelambinis contained a lot of trace elements such as Fe、Mn、Zn、Cu and Cr, whereas harmful elements Pb and Cd were not detected. The recovery and relative standard deviation of these metal elements were 98.58%~101.53% and 0.78%~1.89% respectively. The established method is simple,rapid and accurate. It is a reliable method for the determination of metal elements in Lotus seed and Plumula Nelambinis.