Table 1.

Four solutions used for simulation. The concentrations are all mass concentrations.

Solution	Concentration for training (%)	Concentration for testing (%)
NaCl	5, 10, 15, 20, 25	12
${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6$	5, 10, 15, 20, 25	17
${\mathrm{CuSO}}_4$	2, 4, 6, 8, 10	3
${\mathrm{Na}}_2{\mathrm{CO}}_3$	2, 4, 6, 8, 10	7