Experimental results showed that Cu2 and Fe3 glow effect of aqueous solution of turmeric in a darkened and the smallest concentration of Cu2, which can make the glow of aqueous solution of turmeric is darkened 0.00020 M-0.00030M and the smallest concentration of Fe3, which can make the glow of aqueous solution of turmeric, darkened is 0.00025 M-0.00035 M.
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