Table 2.
Summary statistics of alkali metals (Li, Na, and K) and minerals (Mg, Ca) in approved bottled waters (a), unapproved bottled waters (b), foreign bottled waters (c), and spring waters (d).
| Element | Matrix | Mean | SE of Mean | Minimum | 1st Quartile | Median | 3rd Quartile | Maximum |
|---|---|---|---|---|---|---|---|---|
| Li (μg/L) | a | 164 | 67 | 0.07 | 0.40 | 4.8 | 94 | 1,557 |
| b | 3.7 | 1.1 | 0.06 | 0.48 | 2.1 | 7.0 | 10 | |
| c | 14 | 11 | 0.5 | 0.66 | 1.4 | 6.8 | 138 | |
| d | 28 | 23 | 0.09 | 0.71 | 1.7 | 5.8 | 984 | |
| Na (mg/L) | a | 49 | 13 | 0.43 | 1.1 | 7.8 | 88 | 222 |
| b | 39 | 11 | 1.2 | 2.4 | 34 | 77 | 84 | |
| c | 10 | 3.3 | 0.00 | 2.4 | 8.6 | 11 | 38 | |
| d | 46 | 14 | 0.30 | 3.5 | 7.5 | 29 | 442 | |
| Mg (mg/L) | a | 19 | 3.9 | 0.80 | 2.2 | 10 | 33 | 73 |
| b | 4.7 | 1.3 | 0.08 | 1.2 | 3.9 | 7.1 | 13 | |
| c | 10 | 2.4 | 0.00 | 2.4 | 10 | 18 | 22 | |
| d | 18 | 7.0 | 0.42 | 3.5 | 6.9 | 18 | 291 | |
| K (mg/L) | a | 3.0 | 0.85 | 0.16 | 0.32 | 0.79 | 3.9 | 18 |
| b | 0.45 | 0.10 | 0.12 | 0.17 | 0.31 | 0.74 | 1.3 | |
| c | 0.81 | 0.20 | 0.12 | 0.31 | 0.61 | 1.2 | 2.1 | |
| d | 1.7 | 0.40 | 0.10 | 0.53 | 0.73 | 1.3 | 13 | |
| Ca (mg/L) | a | 44 | 6.5 | 4.7 | 24 | 30 | 59 | 136 |
| b | 16 | 2.6 | 2.5 | 4.9 | 19 | 23 | 24 | |
| c | 17 | 3.9 | 0.04 | 7.8 | 17 | 19 | 44 | |
| d | 33 | 3.9 | 0.00 | 15 | 27 | 47 | 104 |