Figure 11.

The standard curve of PHPP dissolved in HCl and ethanol, measured at 409 nm. Typical equation:Y = 0.04447 + 0.02571x(wherexis the concentration andYis the absorbance)

Chen et al. Nanoscale Research Letters 2009 4:400-408   doi:10.1007/s11671-009-9254-5