Determination of major and trace elements in six herbal drugs for relieving heat and toxicity by ICP-AES with microwave digestion

To establish a method to simultaneously determine major and trace element contents of Na, K, Cu, Fe, Zn, Mn, Ca, Mg, Cr, Ni, Pb, Se, As and Cd in six herbal drugs. Microwave digestion procedure was applied under optimized conditions for digesting medicinal herbs. Concentrations of elements were determined by ICP-AES. The results indicated that the herbal drugs were abundant in major and trace element contents which are healthy for human body. After optimizing the microwave digestion technology, the recovery of the element was 96.79–103.47% and the RSD < 5.0%. ICP-AES combined with the microwave digestion technology has a lot of merits in terms of saving time and effort, reducing environmental pollution, fast and accurate determination of results in determining major and trace elements.