1. A method for producing a composition comprising non-α-keto peracid and α-keto peracid, wherein said method comprises: contacting an α-keto carboxylic acid with an oxidizing agent under conditions suitable for producing α-keto peracid； bringing α-keto carboxylic acid into contact with an oxidizing agent under conditions suitable for the preparation of non-α-keto peracid. 2. The method of claim 1, wherein the oxidizing agent is selected from the group consisting of hydrogen peroxide, barium peroxide, sodium carbonate peroxide (sodium percarbonate), calcium peroxide, sodium perborate, lithium peroxide, strontium magnesium peroxide, zinc peroxide, potassium superoxide, or their mixtures. 3. A method according to claim 1, wherein the reaction temperature is from about -30 to about 10 ° C. 4. The method of claim 1, wherein the α-keto carboxylic acid comprises α-keto monocarboxylic acid. The method of claim 1, wherein the α-keto carboxylic acid comprises α-keto dicarboxylic acid. The method of claim 1, wherein the α-keto carboxylic acid is selected from the group consisting of pyruvic acid, α-keto butyric acid, α-keto valerianic acid, α-keto glutaric acid, 2-oxo cyclopental acetic acid, or mixtures thereof. . The method of claim 1, wherein the α-keto peracid and non-α-keto peracid are additionally used in a synergistic combination to kill biofilms and microorganisms, including bacterial spores, mycobacteria, gram-negative bacteria, vegetative gram-positive bacteria, fungi, or combinations thereof. . A method of reducing the number of microorganisms on a surface, wherein said method comprises bringing this surface into contact with a solution of an antimicrobial composition comprising an effective amount of non-α-keto1. Способ получения композиции, включающей не-α-кето перкислоту и α-кето перкислоту, где указанный способ включает:приведение α-кето карбоновой кислоты в контакт с окисляющим агентом в условиях, подходящих для получения α-кето перкислоты； иприведение α-кето
