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Loss of probe absorption intensity due to probe binding with bone powder that was subsequently removed from solution. Varying amounts of powder were incubated with 4 μM of either S ⊃ 6C, S ⊃6B, or 2(6B) ⊃S3S in water for 1 h at room temperature and absorbance spectra of the supernatant for each sample was acquired after removal of the powder.
