ResourceSpectroscopy
High Purity Water for Atomic Absorption Spectroscopy
17 Nov 2011Analysis of metals in water samples requires the use of high purity reagents and solvents to ensure the accuracy and precision of measurements. This Application Note is a proof of concept that illustrates the suitability of an ultrapure water purification system for AA measurements. The combination of reverse osmosis, UV photooxidation, activated carbon and ion-exchange resins within the Direct-Q 3 UV system produces ultrapure water directly from tap water. Under the experimental conditions provided by the method, none of these metals were detected.
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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.Water PurificationThere are a number of water purification methods available to remove contamination from laboratory water. These systems include demineralization, reverse osmosis, filtration and ultrafiltration. A combination of methods is sometimes necessary to achieve purified water suitable for use in experiments.Reverse OsmosisUV Photooxidation