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Table 1 Surviving concentration of E. coli O157:H7 in electro-activated solutions of salts of weak organic acids alone or in the combination with acidified NaCl solution during 5 min of treatment

From: Electro-activation of potassium acetate, potassium citrate and calcium lactate: impact on solution acidity, Redox potential, vibrational properties of Raman spectra and antibacterial activity on E. coli O157:H7 at ambient temperature

Treatment

Reduction (log CFU/ml)

100 % anolyte

Anolyte + 1.5 % acidified NaCl

Anolyte + 3.0 % acidified NaCl

Potassium acetate, %

0.10

ND

ND

ND

0.15

ND

ND

ND

0.20

ND

ND

ND

Potassium citrate, %

0.10

5.83 ± 0.11

3.70 ± 0.18

1.84 ± 0.24

0.15

5.71 ± 0.23

3.75 ± 0.22

ND

0.20

5.43 ± 0.32

3.46 ± 0.16

ND

Calcium lactate, %

0.10

4.17 ± 0.16

ND

ND

0.15

4.02 ± 0.18

ND

ND

0.20

2.57 ± 0.23

ND

ND

  1. ND negative by enrichment and no detectable survivors by a direct plating procedure
  2. Initial E. coli O157:H7 population was 6 log CFU/ml
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