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Investigation of Light Scattering for Normalization of Signals in Laser Ablation Inductively Coupled Plasma Mass Spectrometry

Volume 52, Number 1 (Jan. 1998) Page 154-160

Baker, S.A.; Smith, B.W.; Winefordner, J.D.

Light scattering is evaluated for normalizing signals in laser ablation inductively coupled plasma mass spectrometry. The scattering signal produced from the transported ablation aerosol is measured with a laboratory-constructed cell. The technique is used to account for variations in the ablated mass within a matrix as well as between matrices. Matrices that are studied include brass, glass, soil, and Macor ceramic. It is demonstrated that the technique is useful for normalizing analyte signals within a matrix; however, it is not as effective as the use of an internal standard in terms of the precision obtained. The utility of the technique to normalize between matrices is studied for glass, Macor , and soil. The results indicate that light scattering is useful provided that the particle sizes generated are sufficiently similar.