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Enhancement in the fluorescence signal of DHC (2 µM) by increasing concentrations of γ-CDs (A: GCD, B: QAGCD, and C: RAMEG; 0.0–2.0 mM) in different buffers (λex = 325 nm, λem = 410 nm; ex slit: 10 nm, em slit: 20 nm; pH 1.0: 0.10 M hydrogen chloride; pH 3.0: 0.05 M sodium tartrate buffer; pH 5.0: 0.05 M sodium acetate buffer; pH 7.4: 0.05 M TRIS-HCl buffer; pH 10.0: 0.05 M sodium borate buffer).
