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Hydrogen

PDF: Hydrogen Peroxide Plasma Sterilization System

Download 10 times Source: google.com // Topic: Hydrogen File Size: - kb // Total of Page: - Page(s) Last download by toyota2054 Last download on: 3 months ago Share this info: Short Desciption: Abstract: A plasma sterilization process which employs hydrogen peroxide vapor as the precursor for the active species generated during the plasma generation cycle and employs a pre-treatment cycle prior to the plasma generation cycle. Content Inside: 1. A process of plasma sterilization using hydrogen peroxide as a precusor of the active species in the plasma comprising the steps of: placing an item to be sterilized in a chamber, contacting the item with a hydrogen peroxide vapor for a pretreatment time period which is a sufficient time period to allow the hydrogen peroxide to come in close proximity with the item; generating a hydrogen peroxide plasma around the item, and maintaining the item in said hydrogen peroxide plasma for a time period sufficient to allow an active species generated from the hydrogen peroxide plasma to effect sterilization. 2. The process of claim 1 in which the concentration of hydrogen peroxide vapor in the chamber is at least 0.05 mg per liter of chamber volume. 3. The process of claim 1 in which the hydrogen peroxide plasma is pulsed in a power-on-power-off ratio of 1:2. 4. The process of claim 1 in which the concentration of hydrogen peroxide vapor in the chamber is between 0.05 to 10 mg/liter of chamber volume. 5. The process of claim 1 in which the concentration of hydrogen peroxide vapor in the chamber is 0.208 mg/liter of chamber volume. 6. The process of claim 1 in which the pretreatment time period is between 5 and 30 minutes. 7. The process of claim 1 in which the hydrogen peroxide plasma is generated over a period of from 5 to 60 minutes.