Sample No.	Cl⁻ content/(mg∙L⁻¹)	Theoretical COD/(mg∙L⁻¹)	0.25 mol∙L⁻¹ K₂Cr₂O₇ COD/(mg∙L⁻¹)	0.1 mol∙L⁻¹ K₂Cr₂O₇ COD/(mg∙L⁻¹)	0.025 mol∙L⁻¹ K₂Cr₂O₇ COD/(mg∙L⁻¹)
1	1000	50	118.4 [136.8%]	77.3 [54.6%]	45.7 [−8.5%]
2	1000	80	156.4 [95.5%]	109.4 [36.7%]	79.3 [−0.9%]
3	2000	50	138.2 [176.4%]	83.8 [67.6%]	47.1 [−5.8%]
4	2000	80	159.9 [99.9%]	110.6 [38.3%]	80.4 [0.5%]
5	4000	50	170.3 [240.6%]	94.2 [88.4%]	50.8 [1.7%]
6	4000	80	187.4 [134.2%]	120.0 [50.0%]	81.7 [2.1%]
7	8000	50	166.3 [232.6%]	92.0 [84.1%]	49.3 [−1.5%]
8	8000	80	211.3 [164.1%]	115.4 [44.3%]	80.9 [1.2%]
9	15,000	50	183.3 [266.7%]	91.4 [82.8%]	51.5 [3.0%]
10	15,000	80	226.6 [183.2%]	118.2 [47.8%]	83.6 [4.5%]
11	20,000	50	174.6 [249.3%]	85.2 [70.4%]	50.0 [0.0%]
12	20,000	80	215.2 [169.0%]	109.4 [36.7%]	82.8 [3.5%]