九酔渓温泉
Kyusuikei OnsenOperated by · 株式会社 九酔渓観光開発
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Bicarbonate
- Color
- colorless and clear
- Taste
- faintly metallic
- Odor
- almost odorless
Sodium Bicarbonate spring
pH 7.1NeutralHot source · 52°CHigh silica
Composition fingerprint1.6 g/kg dissolved · Hypotonic
Na⁺83
HCO₃⁻69
SO₄²⁻15
Cl⁻15
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Bicarbonate HCO₃⁻
- "soda" — softens skin, leaves it smooth.
Known good for
- Smooth skindry, rough skin
- Aches & jointsstiff shoulders
- Recoveryfatigue, stress
A sodium-led bicarbonate spring — the classic jūsō-sen style, soft and skin-smoothing on contact. Neutral pH with moderate mineralization (about 1,600 mg/kg dissolved solids) gives the water noticeable body without harshness. A generous 122 mg/kg of metasilicic acid leaves the thin silica film that puts this firmly in Japan's beauty-water family.
Sampled at wellhead·Analyzed Apr 13, 2017·公益社団法人大分県薬剤師会 検査センター·Cert no. 大薬検 第7R-29040002
