| Sample No. | Cl− content/(mg∙L−1) | 5:1 | 10:1 | 15:1 | 20:1 |
| 1 | 1000 | 500.0 [0%]* | 511.2 [2.2%] | 495.6 [−0.9%] | 484.0 [−3.2%] |
| 2 | 2000 | 507.2 [1.4%] | 514.4 [2.9%] | 508.0 [1.6%] | 510.4 [2.1%] |
| 3 | 4000 | 519.6 [3.9%] | 495.6 [−0.9%] | 502.4 [0.5%] | 492.0 [−1.6%] |
| 4 | 8000 | 558.4 [11.7%] | 511.6 [2.3%] | 532.0 [6.4%] | 516.0 [3.2%] |
| 5 | 15,000 | 567.2 [13.4%] | 508.4 [1.7%] | 520.0 [4.0%] | 512.8 [2.6%] |
| 6 | 20,000 | 551.2 [10.2%] | 514.8 [3.0%] | 520.0 [4.0%] | 520.0 [4.0%] |