Feasibility Study on a Measurement Method and a Portable Measuring System to Estimate the Concentration of Cloxacillin and β-Lactamase in Milk

Figure 8

Time evolution of the absorbance recorded at 405 nm for the samples composed of milk, CENTA, and AmpC. In particular, () is the absorbance recorded without antibiotic, (+) is the absorbance recorded with antibiotic concentration equal to 5 nM, and () is the absorbance recorded with antibiotic concentration equal to 10 nM (PT3, see Table 2). The horizontal line (—) represents the absorbance recorder at 405 nm at the beginning of the test for a sample composed of milk and CENTA with CENTA concentration equal to 240 M.