Lyophilization or freeze drying is a process in which water is removed from a product after it is frozen and placed under a vacuum, allowing the ice to change. For composing validation protocol of lyophilizer need to carry out its qualification test and. decide acceptance criteria. So during selection of. Hi all, I have a question regarding an OQ of a freeze dryer. Im Validation Manager in a medium size medical devices company and have the.

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Ellab Digital Pressure Sensor: Stoppering All vials are stoppered No vials are damaged. System pressures in the mTorr to mTorr range will usually promote an adequate amount of convection.

When the vacuum level set point is deeper than the vapor pressure of ice at the current product temperature, sublimation can take place. Purified Water System PQ. These can be placed inside of your autoclave.


This regulation requires certain standards of process control and security. If you have one that is excellent. We’ll assume you’re ok with that, but you can opt-out if you wish. The bulk of water removed from the product during freeze drying is via sublimation quualification all of the free ice crystals during the primary drying step.

Basic Principles of Freeze Drying

Hydrocarbon levels on swabs should not exceed the negative control NOTE: The chamber is supplied with clean steam for sterilization. Typically, vacuum levels for freeze drying are between 50mTorr and mTorr with mTorr to mTorr being the most common range.

The cycle time can often be substantially reduced by investigating several factors:. If renting Rigid units, then the verification application lyopholizer applies. It is important to allow a modest amount of additional drying time 30 min to 2 hrs, depending on the product characteristics after the product thermocouple temperature increases to ensure that all of the ice in the entire batch of product has been completely sublimated.


Operation Qualification for Lyophilization

Do not use siliconized stoppers in the lyophilizer. Performance Qualification No water remains in vials or trays after the appropriate freeze drying cycle is performed.

Typically, there are multiple steps involved for both freezing and drying of the product. With the temperature and pressure parameters set, primary drying is then continued for a length of time sufficient for all of the ice crystals to be sublimed.

The product temperature is monitored using thermocouples and then the shelf temperature set point is slowly increased until the product reaches its target temperature. SP’s products support research and production across divers end user markets including pharmaceutical, scientific research, industrial, aeronautic, semiconductor and healthcare. Freeze dryer refrigeration designs are available to provide the lower shelf and condenser temperatures needed to freeze and then condense some organic solvents.

SP Scientific service professionals offer your organization a depth of expertise that is truly unique to our selected industries and markets.

Ltophilizer a clean room environment with very few particulates for ice nucleation, there is a significantly greater amount of super-cooling. Validation equipment recommended for Autoclaves, Sterilizers and ovens. It is OK if the thermocouple touches the bottom of the container.

During annealing, the product temperature is cycled for example: The clean steam piping must be L stainless steel. With simple manifold freeze dryers, the product is placed in a vial or flask depending on quantity, and then frozen in a separate piece of equipment.


Also, the flask might break due to uneven stress. Option to use your own thermocouples, lyophiizer purchase thermocouples ready to go from Ellab. Condenser Capacity Loss of weight from a weighed amount of water in trays is not less than the stated capacity of the condenser. Vacuum is maintained in vials.

U.S. Valdiation Services – Lyophilizer

The type and shape of product being dried and its end-use also need to be considered. As mentioned earlier, each frozen product has a unique critical temperature. When sublimation of ice crystals is complete, the product temperature will increase and approach the shelf temperature. Primary drying is a top-down process with a well-defined sublimation front moving through the product as it dries.

Slower shelf cooling rates do not necessarily yield larger ice crystals because of the effects of super-cooling.

Without knowing the critical temperature of the product, a trial and error approach is required to determine appropriate primary drying temperatures. When the Pirani pressure reading decreases and approaches the true pressure reading of the capacitance manometer, little or no water vapor is present and it can be concluded that primary drying is complete.

This can be accomplished manually using product thermocouples or, if drying in vials, an automated SMART system can be used. Using the vapor pressure of ice table is a scientific way to determine an appropriate pressure for freeze drying.