| http://www.w3.org/ns/prov#value | - However, when the water-soluble inorganic base (b1) is used together with the below-mentioned irreducible alkaline-metal-salt pH buffer (b2) in the present invention, the water-soluble inorganic base (b1) and the irreducible alkaline-metal-salt pH buffer (b2) are jointly used fitly in such a range as to exhibit action of at least either one of them.
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