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Atomic Absorption

The Experts below are selected from a list of 156 Experts worldwide ranked by ideXlab platform

Albert Kh. Gilmutdinov – 1st expert on this subject based on the ideXlab platform

  • Spatially resolved Atomic Absorption analysis
    Journal of Analytical Atomic Spectrometry, 2020
    Co-Authors: Albert Kh. Gilmutdinov, Konstantin Yu. Nagulin, Michael R. Sperling

    Abstract:

    Previous research carried out in our laboratories has shown that all the key parameters of electrothermal Atomic Absorption spectrometry, gas phase temperature, intensity of the probing beam and number density of absorbing species, are generally highly non-uniform over the Absorption volume. Further, it was shown that, when using conventional detection systems based on a photomultiplier tube or a photodiode that can only detect radiation spatially integrated over their working area, absorbance measurements are subject to photometric errors when the absorbing layer is spatially non-uniform. This error is eliminated when using spatially-resolved detection of transmitted intensities with a linear solid state detector (photodiode array, linear CCD). The photometric error of the conventional detection systems does result in an analytical error, if analyte distributions in the Absorption volume produced from an aqueous standard solution and the unknown sample are different. Such a differing distribution could be created under the influence of the sample matrix on the analyte gas phase distribution. An Atomic Absorption spectrometer is described in the paper that allows spatially and temporally resolved detection of both specific and non-specific absorbances. The effect of sample matrix on the analyte gas phase distribution is investigated when atomizing some environmental samples and, for the first time, the results of spatially-resolved Atomic Absorption determination of cadmium and lead in these samples are presented. It is shown that the influence of the matrix on the analyte distribution is significant, resulting in a significant analytical error. By avoiding such errors, the benefits of Atomic Absorption analysis with spatial resolution over conventional AAS are directly demonstrated.

  • Spatially resolved Atomic Absorption spectrometry
    Russian Chemical Reviews, 2006
    Co-Authors: Albert Kh. Gilmutdinov, A. V. Voloshin, Konstantin Yu. Nagulin

    Abstract:

    The review provides an overview of the main steps of development of spatially resolved Atomic Absorption spectrometry. The results of research on the dynamics of spatial distributions of atoms, molecules, condensed nanoparticles, temperature fields in atomisers and the transmitted radiation intensity are generalised. The influence of spatial inhomogeneities on the formation of Absorption signals is considered. The advantages of spatially resolved Atomic Absorption spectrometry are illustrated with examples.

  • Atomic Absorption, Theory
    , 1999
    Co-Authors: Albert Kh. Gilmutdinov

    Abstract:

    The theory of Atomic Absorption spectroscopy is presented, covering atom production, Atomic Absorption and emission line shapes, and methods for calibration and for dealing with interferences.

Konstantin Yu. Nagulin – 2nd expert on this subject based on the ideXlab platform

  • Spatially resolved Atomic Absorption analysis
    Journal of Analytical Atomic Spectrometry, 2020
    Co-Authors: Albert Kh. Gilmutdinov, Konstantin Yu. Nagulin, Michael R. Sperling

    Abstract:

    Previous research carried out in our laboratories has shown that all the key parameters of electrothermal Atomic Absorption spectrometry, gas phase temperature, intensity of the probing beam and number density of absorbing species, are generally highly non-uniform over the Absorption volume. Further, it was shown that, when using conventional detection systems based on a photomultiplier tube or a photodiode that can only detect radiation spatially integrated over their working area, absorbance measurements are subject to photometric errors when the absorbing layer is spatially non-uniform. This error is eliminated when using spatially-resolved detection of transmitted intensities with a linear solid state detector (photodiode array, linear CCD). The photometric error of the conventional detection systems does result in an analytical error, if analyte distributions in the Absorption volume produced from an aqueous standard solution and the unknown sample are different. Such a differing distribution could be created under the influence of the sample matrix on the analyte gas phase distribution. An Atomic Absorption spectrometer is described in the paper that allows spatially and temporally resolved detection of both specific and non-specific absorbances. The effect of sample matrix on the analyte gas phase distribution is investigated when atomizing some environmental samples and, for the first time, the results of spatially-resolved Atomic Absorption determination of cadmium and lead in these samples are presented. It is shown that the influence of the matrix on the analyte distribution is significant, resulting in a significant analytical error. By avoiding such errors, the benefits of Atomic Absorption analysis with spatial resolution over conventional AAS are directly demonstrated.

  • Spatially resolved Atomic Absorption spectrometry
    Russian Chemical Reviews, 2006
    Co-Authors: Albert Kh. Gilmutdinov, A. V. Voloshin, Konstantin Yu. Nagulin

    Abstract:

    The review provides an overview of the main steps of development of spatially resolved Atomic Absorption spectrometry. The results of research on the dynamics of spatial distributions of atoms, molecules, condensed nanoparticles, temperature fields in atomisers and the transmitted radiation intensity are generalised. The influence of spatial inhomogeneities on the formation of Absorption signals is considered. The advantages of spatially resolved Atomic Absorption spectrometry are illustrated with examples.

Dai Guang-bang – 3rd expert on this subject based on the ideXlab platform

  • Development of Indirect Atomic Absorption Spectrometry
    Guangzhou Chemical Industry, 2020
    Co-Authors: Dai Guang-bang

    Abstract:

    The status about indirect Atomic Absorption was introduced,and the application instance of indirect Atomic Absorption was classified,including precipitation method,complex method and oxidation-reduction method.It indicated Atomic Absorption was important in the determination difficult Atomic elements.The advances on the indirect analysis by Atomic Absorption spectrometry were prospected.