Table 4 Solvable coefficients of different metal models.

From: A general framework and practical procedure for improving pxrf measurement accuracy with integrating moisture content and organic matter content parameters

Model form

Mn

Pb

Cu

Zn

Sr

Fe

Y = f(X)

0.655

0.911

0.054

0.971

0.165

0.571

Y = f(X,b)

0.764

0.915

0.332

0.971

0.186

0.576

Y = f(X,c)

–

0.916

–

–

0.243

–

Y = f(X,b,c)

–

0.932

–

0.972

0.283

–

lnY = f(X)

–

0.887

0.035

0.962

0.181

0.615

lnY = f(X,b)

–

0.901

0.368

0.966

0.200

0.619

lnY = f(X,c)

–

0.952

–

–

0.269

–

lnY = f(X,b,c)

–

0.953

–

0.969

0.307

–

  1. – indicates “not tested,” where y is the concentration of Pxrf, X the concentration of ICP-MS, B the moisture content value, and C the content of organic matter. X, B, and C include the best value after the transformation via logarithm, index, and power function.
Back to article page