Determination of Germanium Content in Three Medicinal and Food Homologous Substances by Inductively Coupled Plasma Mass Spectrometry
Study the content and distribution of inorganic and organic germanium in medicinal and food homologs Dendrobium oficinale,Eucommia ulmoides,and Ganoderma lucidum,and support the development of related characteristic industries,providing technical support and law enforcement basis for quality and safety supervision departments.Total germanium in three medicinal and food homologs was determined by inductively coupled plasma mass spectrometry.The inorganic germanium in the samples was evaporated and removed by hydrochloric acid heating,and then the organic germanium content was determined.The total germanium content was deducted from the organic germanium content to obtain the inorganic germanium content.The mass concentrations of total germanium and organic germanium are linearly related to their corresponding CPS within 1.00-100 μg/L,with correlation coefficients of 0.999 9 and 0.999 8,respectively.Spiked recovery tests were made to total germanium and organic germanium in the samples at concentrations of0.02,0.05,0.50,and 2.00 mg/kg,giving recoveries in the range of 90.5％-101％and 94.2％-102％,SRSD of the determined values(n=6)in the range of 3.2％-7.6％and 3.1％-8.4％,respectively,with detection limit of 0.005 mg/kg and quantification limit of 0.02 mg/kg.Among the 31 samples,5 samples were detected of total germanium and organic germanium.A method for determining the content of inorganic and organic germanium in Dendrobium officinale,Eucommia ulmoides,and Ganoderma lucidum by inductively coupled plasma mass spectrometry has been established which with good accuracy,high sensitivity,and low detection limit.
inductively coupled plasma mass spectrometrymedicinal and food homologsinorganic germaniumorganic germanium
万方数据
维普
