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

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.