
(Last update: Feb 25, 1999)
| Quality of Tendo Spa Temperature of Spa Rest after evaporation pH (potentialofhydrogen) | Sodium-Calcium-Sulfate 61.5 C 1,737 mg / kg 8.2 | 
| Positive ion | Negative ion | 
| Lithium ion (Li+) / 0.2 mg Sodium ion (Na+) / 284.9 mg Potassium ion (K+) / 11.1 mg Magnesium ion (Mg2+) / 0.4 mg Calcium ion (Ca2+) / 225.4 mg | Fluoride ion (F-) / 3.4 mg Chloride ion (Cl-) / 136.1 mg Bromide ion (Br-) / 0.2 mg Iodic Ion (I-) / 0.1 mg Sulfuric acid ion (So42-) / 928.5 mg Hydrogen carbonate ion (HCO3-) / 29.7mg Carbonate ion (Co32-) / 0.4 mg | 
| Alienated ingredient | |
| Non ionized | Dissolved gas | 
| Silicic ion (H2SIO3) / 2.9 mg Boric ion (HBO2) / 3.5 mg | Alienated carbon dioxide (CO2) / 0.3 mg | 
| Others | 
| Arsenic 0.04 mg / kg Manganese ion 0.02 mg / kg Zinc ion 0.02 mg / kg Iron (II) ion 0.03 mg / kg Phosphate ion 0.05 mg / kg | 
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