Mineral compositions
Apricot and blueberry jams (Table 2) tend to have lower Ca
levels when compared to grape and strawberry jams. Ca content
of the jams was comparable to the one reported for strawberry,
blueberry and grape (6–16 mg/100 g) (Giampieri et al.,
2012; USDA, 2011; FSANZ, 2010). In comparison,
Gakowska et al. (2010) reported higher Ca content (27.26–
55.44 mg/100 g) in the analyzed strawberry jams. It is possiblethat variations in geographical area and soil from which the
strawberry was collected contribute to the differences seen.
The differences could also be linked to the addition of calcium
chloride as a firming agent to solidify the jams (Luna-Guzma´n
and Barrett, 2000).