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Table 2 Comparison of aluminum concentration in coffee from aluminum moka pots dependent upon number of times used

From: Migration of aluminum from food contact materials to food—a health risk for consumers? Part II of III: migration of aluminum from drinking bottles and moka pots made of aluminum to beverages

Brew number (BN) BN1–2 BN2–3 BN3–4 BN4–5 BN5–6 BN6–1 BN1–5
Aluminum-moka pot 1 > 2* (p = 0.025) 2 > 3 (p = 0.055) 3 > 4* (p = 0.030) 4 > 5 (p = 0.533) 5 < 6* (p = 0.000) 6 > 1 (p = 0.173) 1 > 5* (p = 0.011)
  1. Pair-wise comparisons of coffees from the aluminum moka pots (independent of brand) dependent upon the number of times used to brew (BN)
  2. Significant differences are labeled with an*. The > (<) symbol shows in which of the comparison groups the arithmetic mean was higher (lower). α = 0.05. All n = 9