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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