Fig. 6: Sensitivity, specificity and reusability of this assay. | npj Science of Food

Fig. 6: Sensitivity, specificity and reusability of this assay.

From: Target-inhibited MCOF-Apt-AuNPs self-assembly for multicolor colorimetric detection of Salmonella Typhimurium

Fig. 6

Sensitivity results of a S. Typhimurium concentration-dependent color photographs (0, 102, 103, 104, 105, 106, 107 and 108 CFU/mL), b UV–Vis spectra, c the calibration curve for S. Typhimurium (Δλ vs the log scale of the S. Typhimurium concentrations). d Specificity results of the Δλ of AuNRs in response to different analytes (1-Blank, 2-L. monocytogenes, 3-V. parahaemolyticus, 4-S. aureus, 5-E. coli O157:H7, 6-S. Enteritidis, 7-mixture in the absence of S. Typhimurium, 8-S. Typhimurium, 9-mixture in the presence of S. Typhimurium). The inset showed photographs of the proposed assay in the presence of different bacteria. e The recycle of MCOF under ultrasonic conditions (90 Hz, 30 s) in five successive cycles. Error bars represent the standard deviation of three replicates.

Back to article page