Abstract:

This paper proposes a method to determine the contents of 22 inorganic elements in different parts of Mesona
chinensis Benth by inductively coupled plasma optical emission spectroscopy (ICP-OES). HNO3-H2O2 digestion system
was used to completely decompose the organic compounds by microwave digestion. The calibration curves showed a good
linear relationship for all investigated analytes (r ≥ 0.999 6) with limits of detection of 0.000 1–0.019 0 μg/mL. The average
recovery rates were 98.9%–103.4%, with a relative standard deviation (RSD) of 0.7%–5.2% (n = 6). The method is quick,
easy, accurate and highly sensitive and can be used to accurately determine the contents of 22 inorganic elements in different
parts of Mesona chinensis Benth.

Key words: Mesona chinensis Benth, microwave digestion, inductively coupled plasma optical emission spectroscopy、 (ICP-OES), heavy metal, inorganic elements