2.3.2. Minerals and vitamins
Microwave digestion was used for sample decomposition to
determine magnesium, iron, copper, and zinc using an inductively
coupled plasma optical emission spectrophotometer (ICP-OES),
method no. 984.27 (AOAC, 2005). The acid solution dissolved from
ash residue was used for calcium, sodium, and potassium analyses
by flame atomic absorption spectrophotometer (AAS), method no.
975.03 (AOAC, 2005). Phosphorus was determined by the gravimetric
method (AOAC, 2005). Vitamins C and E were determined
using the HPLC method
2.3.2. Minerals and vitamins
Microwave digestion was used for sample decomposition to
determine magnesium, iron, copper, and zinc using an inductively
coupled plasma optical emission spectrophotometer (ICP-OES),
method no. 984.27 (AOAC, 2005). The acid solution dissolved from
ash residue was used for calcium, sodium, and potassium analyses
by flame atomic absorption spectrophotometer (AAS), method no.
975.03 (AOAC, 2005). Phosphorus was determined by the gravimetric
method (AOAC, 2005). Vitamins C and E were determined
using the HPLC method
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