Journal of Nanomaterials / 2015 / Article / Fig 3

Research Article

Colorimetric Detection System for Salmonella typhimurium Based on Peroxidase-Like Activity of Magnetic Nanoparticles with DNA Aptamers

Figure 3

UV-vis absorption spectra (a) and bar graph at 650 nm (b). The effect of each reagent was tested in the colorimetric system. MNPs@TMB@H2O2: red solid line, MNPs@TMB: blue solid line, MNPs@DNA@H2O2: red dashed line, MNPs@H2O2: blue dashed line, and TMB@H2O2: black dash line. The insets in (b) represent images of the well plates for the different colors in the five cases.

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