Rapid screening and quantification of heavy metals in traditional Chinese herbal medicines using monochromatic excitation energy dispersive X-ray fluorescence spectrometry

Abstract

Traditional Chinese herbal medicines are subject to heavy metal contamination. Standard detection methods are too complicated, time-consuming, and expensive for routine analysis, so low-cost methods are highly demanded for rapid...

Atomic spectrometry update: review of advances in the analysis of clinical and biological materials, foods and beverages

“…It demonstrated a fit for purpose rapid screening method for the edible seaweed industry. Ma et al 134 described a development with EDXRF instrumentation to significantly improve the LODs for As, Cd and Pb in Chinese herbal medicines. A monochromatic excitation source was used by incorporating a doubly curved LiF crystal which reduces the scattering background noise and improving the S/N.…”

A new technique for baseline calibration of soil X-ray fluorescence spectra based on enhanced generative adversarial networks combined with transfer learning

“…To enable the generator to realize the baseline calibration of the input noisy XRF, the loss function expression used for the training of the generator model is shown in eqn (1). The rst part of the loss function of the generator uses the mean square error.…”

“…In recent years, heavy metal pollution has seriously affected human life, and the determination of various heavy metal contents in polluted soil is the primary link for governance and remediation. X-ray uorescence spectroscopy analysis technology is widely used for element concentration prediction in elds such as geology, biology, food, and alloys [1][2][3][4][5][6] due to its simple pre-treatment and being independent of the chemical states of elements. 7 However, since the characteristic peaks of effective elements oen overlap on low-frequency backgrounds, it is difficult to accurately extract background components from the spectrum.…”

Rapid screening of pharmaceutical products for elemental impurities by a high-resolution portable energy dispersive X-ray fluorescence spectrometer using an efficient fundamental parameter method

“…X-ray fluorescence (XRF) spectroscopy is a promising alternative technique for elemental detection due to its simple testing procedure, nondestructive analysis, multi-element detection, and high sensitivity. [8][9][10][11] XRF instrumentation includes wavelength dispersive X-ray fluorescence (WDXRF) and energy-dispersive X-ray fluorescence (EDXRF). 12 In general, the sensitivity of WDXRF is higher than that of EDXRF.…”