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. 2018 Aug 1;18(8):2518. doi: 10.3390/s18082518

Figure 4.

Figure 4

Testing procedure for real-time potentiometric detection of E. coli CECT 675. Starting from left to right: first step, filtration of sample and matrix removal; second step, washing with PBS; third step, elution with PBS and potentiometric detection of E. coli CECT 675 recovered in eluate [78].