Table 1.
Summary of chemical characteristics of Laguna Negra (LN) and Lo Encañado (LE).
| Sample | Ni | Ca | Si | Na | K | Mg | As | CI | F | Nitrate | Sulfate |
|---|---|---|---|---|---|---|---|---|---|---|---|
| LN0 | 0.03 | 20.1 | 2.8 | 3 | 3.05 | 1.9 | UDL | 6.81 | 0 | 0 | 32.46 |
| LN5 | 0.02 | 18.2 | 3.6 | 3.06 | 1.3 | 1.8 | UDL | 6.81 | 0.027 | 0.083 | 38.90 |
| LN10 | 0.02 | 20.6 | 2.25 | 2.4 | 0.95 | 1.9 | UDL | 10.21 | 0.03 | 0.017 | 36.93 |
| LN20 | 0.01 | 16.1 | 0.44 | 2.11 | 3.21 | 1.6 | UDL | 10.21 | 0 | 0 | 36.84 |
| LE0 | 0.02 | 23.1 | 5.35 | 3.68 | 1.14 | 3.5 | 0.004 | 10.21 | 0.02 | 0 | 32.5 |
| LE5 | 0.03 | 24.3 | 2.48 | 4.65 | 0.96 | 5.1 | 0.002 | 13.61 | 0.019 | 0.013 | 33.93 |
| LE10 | 0.03 | 25.7 | 2.06 | 4.69 | 0.97 | 5.1 | UDL | 13.61 | 0.018 | 0 | 34.49 |
| LE20 | 0.03 | 24.2 | UDL | 4.25 | 1.17 | 4.9 | UDL | 10.21 | 0.02 | 0 | 33.79 |
All concentrations are expressed in ppm.
UDL, Under Detection Limits, for Si < 0.38 ppm, for As < 0.002 ppm. The concentration of arsenic, acetate, tartrate, nitrate, fluor, iron, aluminum and zinc, phosphate, formate and acetate were too close to, or below, the detection limit in all the samples of both lakes and were not included in the table.