Table 2.

The kinetic parameters of Si released from the sample in the different organic acids.

The Solution	${\mathbf{C}}_{\mathit{t}}=\mathbf{a}+\mathbf{b}{\mathit{t}}^{1/2}$		${\mathbf{C}}_{\mathit{t}}=\mathbf{a}+\mathbf{b}\mathbf{l}\mathbf{n}\mathit{t}$		${\mathbf{C}}_{\mathit{t}}=\mathbf{a}(1-\mathbf{e}\mathbf{x}\mathbf{p}(-\mathbf{k}\mathit{t}\left)\right)$
	b	R2	b	R2	b	R2
Composite acid	31.67	0.986	202.41	0.893	1.96 × 10−3	0.992
Citric acid	13.83	0.985	90.61	0.925	1.21 × 10−3	0.992
Oxalic acid	8.83	0.988	57.07	0.898	1.08 × 10−3	0.997
Blank	0.61	0.959	4.05	0.963	8.60 × 10−4	0.972