Fig. 2
Comparison of (xi) phage infectious titre (PFU/mL) and (yi) particle concentration (particles/mL) (N = 10 experimental data; o). (a) Difference plot. Dashed lines represent the acceptable limits, i.e., \(Limits=\pm \sqrt{{\left(3{\sigma }_{{y}_{i}}\right)}^{2}+{\left(3{\sigma }_{{x}_{i}}\right)}^{2}}\) according to standard NF EN ISO 15,189:2022 methodology. (b) Particle concentration and phage infectious titre ratio. The dotted line represents the linear regression fitted to the experimental data set and the dashed lines represent the limits of the 95% confidence interval. (c) Particle concentration as a function of phage infectious titre. The dotted line represents the linear regression fitted to the experimental data set and the dashed lines represent the limits of the 95% confidence interval. Statistical analyses: Levene’s test (p = 0.10), paired t-test (t0.05,9 = 2.26), hypothesis test for the slope (tβ1 = 17.66), and hypothesis test for the intercept (tβ0 = 0.15).
