Liato et al. SpringerPlus (2016) 5:1760 DOI 10.1186/s40064-016-3453-1 RESEARCH Open Access 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 Viacheslav Liato1,2, Steve Labrie1,3 and Mohammed Aïder1,2,4* *Correspondence:
[email protected] Abstract 1 Institute of Nutrition and Functional Foods (INAF), Aims: To study the electro-activation of potassium acetate, potassium citrate and Université Laval, Quebec, QC calcium lactate aqueous solutions and to evaluate their antimicrobial effect against E. G1V 0A6, Canada coli O157:H7 at ambient temperature. Full list of author information is available at the end of the Methods and results: Potassium acetate, potassium citrate and calcium lactate aque- article ous solutions were electrically excited in the anodic compartment of a four sectional electro-activation reactor. Different properties of the electro-activated solutions were measured such as: solutions acidity (pH and titratable), Redox potential and vibrational properties by Raman spectroscopy. Moreover, the antimicrobial activity of these solu- tions was evaluated against E. coli O157:H7. The results showed a pH decrease from 7.07 0.08, 7.53 0.12 and 6.18 0.1 down to 2.82 0.1, 2.13 0.09 and 2.26 0.15, after ±180 min of electro-activation± ± of potassium acetate,± potassium± citrate and calcium± lactate solution, respectively. These solutions were characterized by high oxidative ORP of 1076 12, 958 11 and 820 14 mV, respectively.