. "When the alkaline agent is a carbon dioxide precursor, compounds such as carbonate, sesquicarbonate and hydrogencarbonate salts (in this specification, carbonate and hydrogencarbonate, or bicarbonate, are generically referred to as carbonate) of potassium, lithium, sodium, calcium, ammonium, or L-lysine carbonate, arginine carbonate, sodium glycine carbonate, sodium amino acid carbonate can be use" . . .