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Small-Scale variability of metals in soil and composite sampling

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Abstract

Soil pollution data is also strongly scattering at small scale. Sampling of composite samples, therefore, is recommended for pollution assessment. Different statistical methods are available to provide information about the accuracy of the sampling process. Autocorrelation and variogram analysis can be applied to investigate spatial relationships. Analysis of variance is a useful method for homogeneity testing. The main source of the total measurement uncertainty is the uncertainty arising from sampling. The sample mass required for analysis can also be estimated using an analysis of variance. The number of increments to be taken for a composite sample can be estimated by means of simple statistical formulae. Analytical results of composite samples obtained from different fusion procedures of increments can be compared by means of multiple mean comparison. The applicability of statistical methods and their advantages are demonstrated for a case study investigating metals in soil at a very small spatial scale. The paper describes important statistical tools for the quantitative assessment of the sampling process. Detailed results clearly depend on the purpose of sampling, the spatial scale of the object under investigation and the specific case study, and have to be determined for each particular case.

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Authors and Affiliations

  1. Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University of Jena, Lessingstr. 8, D-07743, Jena, Germany

    Jürgen W. Einax & Jörg Kraft

Authors
  1. Jürgen W. Einax
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  2. Jörg Kraft
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Correspondence to Jürgen W. Einax.

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Einax, J.W., Kraft, J. Small-Scale variability of metals in soil and composite sampling. Environ Sci & Pollut Res 9, 257–261 (2002). https://doi.org/10.1007/BF02987500

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  • DOI: https://doi.org/10.1007/BF02987500

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