Determination of the concentrations of heavy metals in Massa Medicata Fermentata by microwave digestion and inductively coupled plasma mass spectrometry
Determination of the concentrations of heavy metals in Massa Medicata Fermentata by microwave digestion and inductively coupled plasma mass spectrometry
Objective To develop an inductively coupled plasma mass spectrometry(ICP-MS)for the determination of concentrations of five heavy metals including copper(Cu),arsenic(As),cadmium(Cd),mercury(Hg)and lead(Pb)in Massa Medicata Fermentata(MMF).Methods ICP-MS was used to measure concentrations of Cu,As,Cd,Hg and Pb in samples of MMF after being treated with microwave digestion,using the mixed solution of 72Ge,115In,209Bi as an inter-nal standard.Results The five elements had good linear relationship(r≥ 0.999 6).The RSD of instrument precision ranged from 3.3％to 3.7％.The relative standard derivation of method repeatability ranged from 3.3％to 3.8％.The recov-ery of the method ranged from 88.67％to 98.40％.The detection limit of the method was between 0.001 1 and 0.022 0 mg/kg.Ten batches of samples were detected with different concentrations of Pb,As,Hg,Cd and Cu,but were within the per-missible limits.Conclusion This method is simple to operate,and has high accuracy and sensitivity.
关键词
六神曲/重金属及有害元素/微波消解/电感耦合等离子体质谱
Key words
Massa Medicata Fermentata/Heavy metals and harmful elements/Microwave digestion/Inductively coupled plasma mass spectrometry
万方数据