Dry Heat Sterilizer Classification
Dry heat sterilization refers to sterilization in a dry environment (such as a flame or hot dry air) technology. General flame sterilization and dry hot air sterilization.
A flame sterilization method is a method of sterilization using direct flame burning. The method of sterilization rapid, reliable, simple and suitable for flame-resistant material (such as metal, glass and porcelain, etc.) sterilized goods and appliances.
2 dry hot air sterilization method is a high-temperature dry and hot air sterilization methods. The law applies to glass and metal products as well as the gas does not allow heat to penetrate the high-temperature grease (such as oily ointment mechanism for injecting oil, etc.) and high-temperature sterilization powder chemicals. In hot and dry state, due to poor heat penetration, strong heat resistance of microorganisms to be prolonged effect of the high temperature to achieve the purpose of sterilization.
A brief introduction about dry heat sterilization parameters
Dry heat sterilization can be used but should be able to withstand higher temperatures the steam to penetrate , or easily damaged goods moist heat sterilization . Meanwhile dry heat is also used in the pharmaceutical industry in addition to the original method of heat . Ability to evaluate the relative dry heat sterilization , the general death rate can be similar to the units and biological indicators F0 values.Stay tuned on http://www.autoclavesale.com/ .
( A ) D value and the Z value
D is the value at a certain temperature to kill 90% of the microorganism (or a residual ratio of 10% ) the time required for sterilization . Under certain sterilization conditions , different microorganisms have different values of D ; same microbes under different sterilization conditions , D value is not the same . Thus D value with species, environmental and microbial sterilization temperature changes varies .
Z value refers to the sterilization time is reduced to 1/ 10 the desired elevated temperature or at the same time of sterilization , the desired microorganism kill 99% of the increased temperature .
(B ) F value and F0 value
1 . F value
F is at a temperature (T), the sterilization effect produced by a given Z value and the reference temperature in the sterilizing effect (T0) for a given value of Z generated by the same, corresponding to the time of sterilization , units with min . F values commonly used in dry heat sterilization.
2 . F0 value
F0 is a sterilization temperature (T) , the sterilization effect produced at 10 ℃ and sterilization effect produced by the same 121 ℃ considerable time (min). That is , regardless of the temperature change inside the sterilization effect is equivalent to t min F0 minute sterilization at 121 ℃ effect. F0 currently applies only to hot sterilized .