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Selectivity of the fluorescence assay of Hg2+. The fluorescence intensity of TMPyP-dT30 was attained in the absence (Blank) and presence of 4.0 μM of Hg2+, Pb2+, Cu2+, Fe3+, Fe2+, Cd2+, Cr3+, Mg2+, Mn2+ or Ni2+. The vertical bars designate the standard deviation of the mean of three replicate measurements.
