parameter

S_max

EPC₀

ash-P

TOC

P_r

K_f

Ox-Fe

0.894*

−0.195

0.754

0.619

−0.764

−0.311

Ox-Al

0.413

0.392

0.653

0.774

−0.168

0.124

HCl-Ca

0.626

0.557

0.940*

0.928*

−0.387

−0.561

HCl-Mg

−0.604

0.122

0.059

0.075

0.210

0.186

TOC

0.765

0.723

0.957*

1

−0.144

−0.431