ResourceSpectroscopy
EDXRF Analysis of Arsenic and Lead in Dietary Supplement
6 Nov 2012In recent years dietary supplements, food products that promote and maintain health and are used to improve disease prevention and enhance immunity, have become widely available in convenience stores and supermarkets. Analysis of toxic heavy metals in dietary supplements such as Arsenic (As) and lead (Pb) is typically conducted using an emission spectrophotometer (ICP) or atomic absorption spectrophotometer (AA). These approaches however, require time consuming preparation procedures. In this application note from Shimadzu an energy dispersive X-ray fluorescence spectrometer, which permits very easy sample preparation, was used for the rapid quantitative analysis of As and Pb in a dietary supplement.
Links
Tags
Atomic Absorption / Emission SpectroscopyAtomic absorption spectroscopy (AAS) and atomic emission spectroscopy (AES) — also called optical emission spectroscopy (OES) — are used to detect the elemental constituents in samples. Both techniques involve the atomization of a sample. Atomic absorption spectrometers may use a flame or furnace to create an atomic vapor of the sample before irradiation with spectral light. Optical emission spectrometers may use a flame, inductively coupled plasma (ICP), microwave plasma (MP) or spark arcs to atomize and excite the sample. At higher excitation energies, electrons can be emitted instead of photons, which can be useful for samples that can’t be atomized and for surface analysis. Explore electron spectroscopy equipment such as Auger spectrometers and photoelectron spectrometers for surface elemental analysis of samples. Find the best atomic absorption, photoelectron and optical emission spectrometers in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.X-Ray Diffraction and SpectroscopyX-Ray diffraction & spectroscopy are used in material characterization to discern the structure and elemental composition of a sample. X-Ray diffractometers (XRD) are superior instruments in elucidating the dimensional atomic structure of crystalline materials, including powders, thin films and single crystals. For large unit cells or ordered macromolecules, consider small-angle X-ray scattering (SAXS). X-ray spectroscopic techniques include X-ray fluorescence (XRF) and X-ray photoelectron spectroscopy (XPS), both providing simple and accurate methods for determining the elemental composition of a material. Energy dispersive (EDXRF) and wavelength dispersive (WDXRF) XRF spectrometers are available, as well as handheld/portable devices. High-resolution, 3D microstructure characterization of materials can be achieved with X-ray microscopes combining sub-micron resolution imaging with 3D computed tomography. Find the best XRD and XRF spectrometers in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Food and Beverage AnalyzersFood and Beverage Analyzers are commonly used to provide information about the chemical composition, structure and physical properties of food materials.Heavy MetalsX-Ray FluorescenceX-ray fluorescence (XRF) is an analytical technique used to determine the elemental composition of materials. It is widely used in geology, materials science, and environmental testing for detecting heavy metals and other elements. Browse our peer-reviewed product directory to find the best XRF systems, compare products, check reviews, and get pricing directly from manufacturers.Dietary SupplementsArsenicArsenic is a toxic element that is used in the production of pesticides. Arsenic contamination of groundwater is a major issue for both drinking water and for uptake in foodstuffs such as rice.Lead