. 2015 Jan 5;7(1):21–33. doi: 10.3390/toxins7010021

Table 2.

Correlation matrix of the free zearalenone (ZEN) concentration and the physicochemical properties of the 27 mycotoxin binders.

Parameters		Free ZEN concentration pH 2.5	Free ZEN concentration pH 6.5	Free ZEN concentration pH 8.0	Average free ZEN concentration
Free ZEN concentration pH 2.5	R	1	0.887 **	0.874 **	0.948 **
Free ZEN concentration pH 2.5	Sig.	-	0.000	0.000	0.000
Free ZEN concentration pH 6.5	R	0.887 **	1	0.955 **	0.979 **
Free ZEN concentration pH 6.5	Sig.	0.000	-	0.000	0.000
Free ZEN concentration pH 8.0	R	0.874 **	0.955 **	1	0.976 **
Free ZEN concentration pH 8.0	Sig.	0.000	0.000	-	0.000
Average free ZEN concentration	R	0.948 **	0.979 **	0.976 **	1
Average free ZEN concentration	Sig.	0.000	0.000	0.000	-
d-spacing	R	−0.631 **	−0.632 **	−0.659 **	−0.662 **
d-spacing	Sig.	0.000	0.000	0.000	0.000
Swelling	R	0.090	0.122	0.182	0.137
Swelling	Sig.	0.654	0.545	0.364	0.495
CEC	R	0.319	0.237	0.266	0.282
CEC	Sig.	0.104	0.234	0.179	0.153
pH	R	0.192	0.285	0.357	0.290
pH	Sig.	0.339	0.149	0.067	0.142
Ca²⁺	R	0.257	0.258	0.256	0.266
Ca²⁺	Sig.	0.205	0.204	0.207	0.189
K⁺	R	0.394 *	0.379	0.360	0.389 *
K⁺	Sig.	0.042	0.051	0.065	0.045
Mg²⁺	R	−0.399 *	−0.316	−0.227	−0.321
Mg²⁺	Sig.	0.039	0.108	0.254	0.102
Na⁺	R	0.302	0.240	0.267	0.278
Na⁺	Sig.	0.125	0.227	0.178	0.160
RH	R	0.082	−0.006	0.055	0.045
RH	Sig.	0.684	0.977	0.785	0.824
MF	R	0.421 *	0.419 *	0.525 **	0.472 *
MF	Sig.	0.029	0.030	0.005	0.013

R: Pearson correlation coefficient; Sig.: significance level; * significant at the 0.05 level (two-tailed); ** significant at the 0.01 level (two-tailed); CEC, cation exchange capacity; pH, acidity of the samples; Ca²⁺, K⁺, Mg²⁺, Na⁺, exchangeable base cations; RH, relative humidity; MF, mineral fraction.