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. 2018 Apr 23;8(27):15248–15252. doi: 10.1039/c8ra01799a

The total amount of Cu2+ released to solution after cation-exchange reaction measured by ICP-MS.

C DNA = 0 C DNA = 1.0 × 10−9 M C DNA = 1.0 × 10−8 M
Cu2+ concentration applied cycle I route (M) <0.000 7.19 × 10−6 2.78 × 10−5
Cu2+ concentration applied cycle I + cycle II route (M) <0.000 3.31 × 10−5 1.22 × 10−4