Human plasma contains a large number of therapeutically valuable proteins such as albumin, various immunoglobulins, factor VIII, fibronectin, and other proteins. The process of extracting and purifying these proteins is known as plasma isolation.
Plasma separation is achieved through a series of extraction and precipitation steps. Impurities in the plasma, which can cause product instability and clogging of downstream filters, must be removed using pre-filters.
The solution is also clarified and impurities removed prior to chromatography and ultrafiltration. For the decontamination of heat-sensitive proteins, final decontamination filtration is usually used.
Filtration That Meets the Demands of Life-Critical Blood Products
Working with blood-derived products isn’t like filtering a buffer or a standard API solution. The materials are complex, the regulatory bar is high, and there’s very little margin for error. Plasma fractionation facilities, hospital blood banks, and biopharmaceutical manufacturers handling human serum albumin, coagulation factor concentrates, or intravenous immunoglobulin (IVIG) all face the same core challenge: how do you reliably remove contaminants without damaging fragile proteins or compromising yield?
That’s where choosing the right filtration solution makes a tangible difference. Brother Filtration supplies membrane pleated cartridges, depth filters, and sterile vent filters that have been selected and used specifically in blood product manufacturing environments , from crude plasma clarification all the way through to final fill-finish sterilising filtration. This page covers the filtration challenges specific to blood product processing, the filter types best suited to each stage, and how our product line up with the application requirements of this demanding industry.
Our separation goal
Remove gums, aggregates, non-target proteins, lipids, and particles prior to downstream purification and protect downstream sterile filtration or chromatography columns.
Control the level of microorganisms in the production process.
Offering sterilization filtration meets the regulations and laws.
Requirements by application
- Pre-filtration must be able to remove impurities without retaining the target product.
- To ensure production time and costs, filter applications with consistently high flow rates and high throughput.
- The filter must not contaminate the material solution, especially metals such as aluminum.
Why Blood Product Filtration Is More Demanding Than Standard Pharma Processing
Blood products occupy a unique position in the pharmaceutical world. Unlike small-molecule drugs, blood-derived biologics such as albumin, factor VIII, factor IX, Von Willebrand factor (VWF), and immunoglobulins are inherently complex and they’re sensitive to pH shifts, temperature changes, shear forces, and surface interactions. A filter membrane with high non-specific protein adsorption can quietly strip a meaningful percentage of your yield before you ever notice.
On top of the protein sensitivity issue, there are the regulatory requirements to consider. Blood products are subject to some of the strictest controls in pharmaceutical manufacturing:
- FDA 21 CFR Part 606 governs blood product manufacturing practices in the US
- EU GMP Annex 2 covers biological medicinal substances, including plasma-derived products
- USP <1229> and USP <1229.4> set the framework for sterilising filtration and vent filtration
- ICH Q5A addresses viral safety relevant because of the viral reduction steps built into most plasma fractionation processes
- PIC/S guidelines align with EU GMP and apply across many regulated markets globally
Getting filtration wrong in this context doesn’t just mean a failed batch. It can mean a product recall, a regulatory action, or worse. That’s why most manufacturers over-engineer their filtration systems, deliberately using multi-stage processes with validated filters at each step.
Recommended filters
| Step of filtration | Recommended filters |
| Pre-filtration | Glass fiber/PP pleated filter cartridge |
| Air/Gas Filtration | Hydrophobic PTFE pleated filter cartridge |
| Final filtration | PES membrane pleated filter cartridge |
Blood Product Applications We Support
Our filtration products are used across a broad range of blood-derived and plasma-derived product types. Common applications include:
- Human Serum Albumin (HSA): sterile filtration prior to fill-finish; low-binding PES membranes preferred
- Intravenous Immunoglobulin (IVIG / IgG): bioburden reduction and final sterilising filtration
- Coagulation Factor Concentrates (Factor VIII, IX, VWF): protein-sensitive filtration at 0.2 µm
- Fresh Frozen Plasma (FFP): pre-filtration for cell removal, then sterilising filtration
- Platelet-Rich Plasma (PRP): low protein-binding membrane required to protect platelet-derived growth factors
- Recombinant blood proteins expressed in CHO or BHK cells: similar to standard biologics, filtration needs
- Plasma-derived clotting factor buffers and formulation excipients: routine pharmaceutical-grade filtration
Whether you’re running a large-scale plasma fractionation operation or a smaller clinical blood banking facility, the filtration requirements across these product types share a common thread: you need validated, traceable, low-extractables filters that won’t interact with your product.
Talk to Our Filtration Team
Blood product filtration isn’t a one-size-fits-all conversation. The right filter for your albumin fill-finish operation might be completely different from what a factor VIII manufacturer needs — and both of those are different again from what a PRP processing unit requires.
If you’re working through a filter selection, scaling up a process, or trying to qualify a filter for a regulatory submission, our team is available to help. We can provide:
- Sample cartridges for compatibility and extractables testing
- Sizing calculations based on your batch volumes and flux requirements
- Integrity test protocol guidance for your specific filter format
- Technical documentation and regulatory support packages on request
- Fast turnaround quotes for single-use and multi-use filter configurations
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