Table 3.

The solutions used in practical experiments. All solutions except NaI were used in dual-energy imaging. All solutions were used in $k$-edge imaging. All concentrations are mass concentrations except that concentration of ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}$ is volume concentration. (Due to space limitations, only results of testing concentrations listed in the table would be shown below.)

Solution	Concentration for training (%)	Concentration for testing (%)
NaCl	5, 10, 15, 20, 25	7, 12, 19
${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6$	5, 10, 15, 20, 25	17, 21
${\mathrm{CH}}_3\mathrm{COONa}$	5, 10, 15, 20, 25	17
${\mathrm{CuSO}}_4$	2, 4, 6, 8, 10	3, 7, 9
${\mathrm{CaCl}}_2$	2, 4, 6, 8, 10	7
${\mathrm{Na}}_2{\mathrm{CO}}_3$	2, 4, 6, 8, 10	7
${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}$	10, 20, 30, 40, 50, 60, 70, 80, 90, 100	22, 47
NaI	2, 4, 6, 8, 10	3