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Accurate Determination of Lead in Different Dairy Products by Graphite Furnace Atomic Absorption Spectrometry
18 Oct 2011This application note describes a simple and direct dilution method for sample preparation, followed by automated analysis using Graphite Furnace Atomic Absorption Spectrometry (GFAAS). This method minimizes sample preparation, and also reduces potential contamination while still maintaining the speed of analysis. A PerkinElmer® PinAAcle™ 900T flame and longitudinal Zeeman atomic absorption spectrometer was used.
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Sample PreparationSample preparation can improve the quality and speed of separation techniques. Products to assist sample preparation include filtration equipment, evaporators, membranes and sieves.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.GFAAS