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Measurement of pH in mineral water samples.
| Mineral Water Brand | pH a | pH b |
|---|---|---|
| Ganten | 5.93 | 5.9 |
| NongFu (suitable for infants) | 7.13 | 7.3 |
| NongFu | 7.34 | 7.4 |
| Alps | 6.80 | 6.6 |
| LIFELONG | 7.74 | 7.7 |
| Evergrande Spring (low sodium) | 7.21 | 7.2 |
| Perrier (carbonated water) | 5.32 | 6.2 |
| Wahaha (soda water) | 8.09 | 7.9 |
a pH was measured with a PHB-1 Instruments pH meter (San Xin, Shanghai, China). b pH was measured with the fluorescence pH sensor based on the CDs in this work.
