Research Quality Guidelines and Use of Balneological Peat
cohort Grade C 2008 Open access
Authors: Korhonen, R.
Journal: Proceedings of the 13th International Peat Congress : 303-306
Key Findings
- Finnish balneological peat quality criteria established: H6+ humification (ideal H8), HA >20% DW, ash <15% DW, sulfur <0.3% DW, water >85% WW
- Average humification degree H7 (von Post scale) across 23 Finnish mires
- Average pH 4.4; ombrogenic Sphagnum peat had lower pH than minerogenic Carex peat
- HA content: Sphagnum 24.8% DW, Carex 26.8% DW; FA: 9.6% in both types
- Humin content: Sphagnum 29.9%, Carex 35.1%
- Hemicellulose: Sphagnum 17%, Carex 11.8%; Pectins: Sphagnum 5.9%, Carex 2.5%
- Heat retention: peat mixtures from 17 mires dropped <1°C in 20 min; water cooled 3.5°C in same period
- Clear positive correlation between HA content and degree of humification
- Negative correlation between humification and FA, hemicellulose, cellulose, pectins
- No harmful bacteria or heavy metals detected in Finnish balneological peat
Systematic characterization of Finnish balneological peat from 23 mires (238 samples for physical, 105 for chemical analysis). Establishes quality criteria for therapeutic peat: minimum H6 humification (H8 recommended for best quality), humic acid >20% dry weight, ash <15%, sulfur <0.3%. Key compositional data: Sphagnum and Carex peats have similar HA (24.8–26.8% DW) and identical FA (9.6% DW) content, but differ in hemicellulose and pectin levels. Thermal retention is excellent — peat mixtures cool <1°C in 20 minutes vs 3.5°C for water alone. The positive correlation between humification and HA content confirms humification degree as a reliable proxy for therapeutic quality.
balneological-peatquality-guidelinesFinlandhumificationthermal-retentionhumic-acid-contentchemical-compositionIPS