Peroxide and Vinegar Sterilization
Peroxide & Vinegar Sterilization is a simple, inexpensive but effective home method of sterilizing produce using everyday products in the home. It will kill almost all Salmonella, Shigella, and E. coli O157:H7 bacteria. You only need two spray bottles from a dollar store, white vinegar, and drug store hydrogen peroxide.
You work with two clean, opaque spray bottles. In one, you put a solution of 3 % hydrogen peroxide, the same strength as you get from an ordinary drugstore for disinfecting wounds. In the other spray bottle, you put white vinegar (or apple cider vinegar.) Do not dilute either of them. It is recommended that you do not mix the two mixtures together in one bottle. It's not as effective if you try to mix the two liquids in one sprayer and just do it all at once .
You spritz the item to be sterilized with one, then with the other. Though it doesn't matter whether you spray with the vinegar or the peroxide first, it is important that you apply the second mist right after the first one.
The peroxide taste is undetectable. A hint of the vinegar taste is still there, but that is fine for most food applications. But dealing with that taste even is easy, if you want: do the spritzes first and then, afterwards, rinse your raw veggies in water as per usual.
The method can be used for uncooked vegetables destined to be used raw in salads, such as lettuce, tomatoes, peppers, etc, or being put out on dip or relish trays. It will also sanitize food preparation surfaces including wooden cutting boards and plastic, steel, and meat surfaces.
There is no need to sterilize produce which will be thoroughly cooked, as the heat temperatures will deal with any bacteria.
While at the University of Nebraska, she discovered that while vinegar and peroxide had abilities to sterilize, when used in conjunction with each other their strength was greatly magnified.
"If the acetic acid [vinegar] got rid of 100 organisms, the hydrogen peroxide would get rid of 10,000, and the two together would get rid of 100,000." 
In later tests at the Virginia Polytechnic Institute and State University, she found the combination will kill almost all Salmonella, Shigella, and E. coli O157:H7 bacteria.
 If you mix the two together in one bottle, a weak form of peracetic acid is formed. Peracetic Acid ( aka peroxyacetic acid) is a mixture of acetic acid and hydrogen peroxide. Peracetic Acid is primarily used for deactivation of a large variety of pathogenic micro-organisms in the industrial food industry, medical supplies and to prevent biofilm formation in paper pulp industries. It is usually produced in concentrations of 5 - 15%. This industrial formulation is toxic by inhalation, ingestion or if absorbed through skin; caustic and corrosive at concentrations > 10%; irritant at concentrations below 2%. Retail vinegar is a mixture of acetic acid and water composed of 4 to 8% acetic acid. Hydrogen peroxide at 3 % and retail versions of vinegar are an extremely diluted form of peracetic acid. Mixing the diluted form of acetic acid (known as vinegar) with 3% hydrogen peroxide forms a weak form of peracetic acid that may cause some reaction to those who are very sensitive to it - another reason, besides effectiveness, that applying the two solutions separately is recommended.
 Sumner, Susan in Raloff, Janet. Food for Thought. Science News Online. 28 September 1996.
See also: Peters, D., S.S. Sumner, et al. Control of pathogenic bacteria on fresh produce, a paper (abstract #168) presented in Seattle on July 2 at the 83rd annual meeting of International Association of Milk, Food and Environmental Sanitarians. 1996.
SterilizationPeroxide and Vinegar Sterilization; Sterilizing Jars
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