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标题：Impedimetric test for rapid determination of performic acid (PFA) biocidal activity toward Echerichia coli
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作者：Małgorzata Lasik ; Renata Dobrucka ; Piotr Konieczny 等
期刊名称：Acta Scientarum Polonorum - Technologia Alimentaria
印刷版ISSN：1644-0730
电子版ISSN：1898-9594
出版年度：2013
卷号：12
期号：4
页码：385-394
出版社：Agricultural University of Poznan Press
摘要：Background. Performic acid has recently become available on a commercial scale for potential use in waste-water disinfection and can become an innovative biocide for various purposes in food processing. The aim of our study was: 1) to investigate the antimicrobial resistance of performic acid as high active and non toxic chemical disinfectant against Escherichi coli (hygiene indicator test microorganism used in industrial micro- biology) and 2) to evaluate the electrical impedance measurement method usefulness for fast and high precise test of antibacterial activity.Material and methods. Four types of antimicrobial disinfectants (commercial 35% hydrogen peroxide, 1% performic acid, 35% hydrogen peroxide and 15% formic acid) were tested against Escherichia coli as hygiene indicator test microorganism. By evaluating the biocidal activity of selected disinfectants two methods were compared: electrical impedance measurement and classical serial dilution method with turbidity effect.Results. It was stated that the performic acid expressed the highest antibacterial activity in comparison to other tested peroxide disinfectants: commercial 35% hydrogen peroxide solution and components required for performic acid production: 35% hydrogen peroxide solution with stabilizers and 15% formic acid solution with stabilizers). It was demonstrated that the proposed alternative microbiology method of electrical imped- ance measurement facilitates a rapidly and more precise analyses of the intensity of disinfectants inhibition effect.Conclusions. It can be postulated that both, the performic acid disinfectants as well as the impedimetric method can be a good advantage in the industrial microbiology.
关键词：performic acid; impedance measurement; disinfection; biocides