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Institut Jožef Stefan, Ljubljana (IJS)
  • Estimation of uncertainty arising from different soil sampling devices : The use of variogram parameters
    De Zorzi, Paolo ...
    In the frame of the international SOILSAMP project, funded and coordinated by the National Environmental Protection Agency of Italy (APAT), uncertainties due to field soil sampling were assessed. ... Three different sampling devices were applied in an agricultural area using the same sampling protocol. Cr, Sc and Zn mass fractions in the collected soil samples were measured by k0-instrumental neutron activation analysis (k0-INAA). For each element-devicecombination the experimental variograms were calculated using geostatistical tools. The variogram parameters were used to estimate the standard uncertainty arising from sampling. The sampling component represents the dominant contribution of the measurement uncertainty with a sampling uncertainty to measurement uncertainty ratio ranging between 0.6 and 0.9. The approach based on the use of variogram parameters leads to uncertainty values of the sampling component in agreement with those estimated by replicate sampling approach.
    Vir: Chemosphere. - ISSN 0045-6535 (Vol. 70, 2008, str. 745-752)
    Vrsta gradiva - članek, sestavni del
    Leto - 2008
    Jezik - angleški
    COBISS.SI-ID - 21268519

vir: Chemosphere. - ISSN 0045-6535 (Vol. 70, 2008, str. 745-752)

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