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Statistically significant (at p ≤ 0.05) correlation (r) between mineral content and acidity in coffee infusions.
| Correlations (r) between Mineral Content and Acidity: | ||
|---|---|---|
| Positive | Negative | |
| (a) in Aeropress coffee infusion | ||
| acidity and | Mg; P; K; Na; Sr; S | Mn; Al |
| (b) in espresso coffee infusion | ||
| acidity and | Mg; P; K; Na | Fe; Co; Cu |
| (c) in simple infusion coffee | ||
| acidity and | Ca; Mg; P; K; Fe; Ni | Co |
| (d) in French press coffee infusion | ||
| acidity and | Mg; Mn; P; K; Na | Zn; Fe; Cr; Sr; Al |
