Determination of 7 Trace Elements in Chinese Herbal Medicine by Single Wavelength Excitation-Energy Dispersive X-ray Fluorescence Spectrometry
Journal Title: Chinese Journal of Inorganic Analytical Chemistry - Year 2025, Vol 15, Issue 6
Abstract
In this study，with the aim of eliminating the complex pre-processing procedures in traditional element detection and enabling rapid non-destructive detection and analysis of multiple trace elements in Chinese Herbal medicine，a rapid detection method for Cu，Ni，Zn，Fe，Sr，Ba，Mn in Chinese Herbal Medicine sample was developed using a single wavelength excitation-energy dispersion X-ray fluorescence spectrometer. Eleven types of Chinese herbal medicine samples，namely Pinellia ternata，Scutellaria baicalensis，Coptis chinensis，Achyranthes chuanxiong，Fangfeng，Chuanqiong，Rheum palmatum，Poria cocos，Angelica sinensis，Fructus Aurantii，and Rehmannia glutinosa，were selected for detection by a single wavelength excitation energy dispersive X-ray fluorescence spectrometer. Through the exploration of sample pre-treatment conditions such as sample particle size，compression pressure during compression，holding time，and compression thickness，the results reveal that optimal detection can be achieved when the sample is crushed to a particle size below 0.30 mm，the pressure during compression was greater than or equal to 15 MPa，the holding time was greater than or equal to 60 s，and the compression thickness was greater than or equal to 3 mm. Under the above conditions，the detection limits (LOD) of the above 8 elements were 0.44，0.37，0.44，0.72，0.12，0.28，and 0.57 mg/kg，respectively；the relative standard deviation (RSD) ranges from 0.30% to 15.3%，and the linear regression coefficient (R2) between multi-elements measured by this proposed method and microwave digestion inductively coupled plasma mass spectrometry (ICP-MS) was greater than 0.99. The sample used in the experiment weighs less than 0.5 kg and the detection time was within 10 minutes. The research indicates that the method established in the experiment is simple，fast，reliable，and accurate，and is suitable for the detection of trace metal elements in Chinese herbal medicine.
Authors and Affiliations
Hongrui PAN, Fangfang LI, Wenshuo CHEN, Yanjun YU, Jiebo MI, Yongchao YANG, Mingyue SU
Keywords
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- EP ID EP767904
- DOI 10.20236/j.CJIAC.2025.06.018
- Views 7
- Downloads 0
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