Filta-Max®World Leader for the Capture and Recovery of Cryptosporidium and Giardia The unique capture and recovery technology of the Filta-Max system has made it the number one Cryptosporidium and Giardia filter in the world.
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Proven technology and performance
Superior Technology
- The Filta-Max system has been specifically designed to optimize both the capture and recovery of the waterborne pathogens, Cryptosporidium and Giardia.
- The filter is made of open-cell foam discs that have been compressed to give a nominal porosity for the capture of Cryptosporidium and Giardia.
- After sampling, the foam is decompressed, enabling the captured organisms to be recovered by a simple washing and concentration procedure.
Superior Performance
- Consistently recovers greater than 70% of target organisms.
- High volumes of both finished water (1000 liters) and raw water (50 liters) can be filtered to provide greater sensitivity.
- Samples can be concentrated to 25mL without centrifugation.
- The filter operates at sampling flow rates of up to 4 liters per minute.
Proven
- U.S. EPA Method 1623 and UK DWI approved.
- More Cryptosporidium and Giardia tests are done worldwide using the Filta-Max system than all other filtration technologies combined.
Scientific Basis: How Filta-Max® Works
The Filta-Max module comprises multiple layers of open-cell foam discs that are compressed to create a filter with a nominal pore size to effectively trap Cryptosporidium and Giardia. After sampling, the filter is processed by releasing the compression of the foam discs and washing, enabling all captured material to be recovered. It is a simple, yet extremely efficient system.
Filtration
To sample, the filter module is placed in a reusable housing, which is attached to the required sampling source. A head pressure of 0.5 Bar (7.5 psi) is required to create a flow, and the recommended operating pressure is 5 Bar (75 psi). This pressure will create a flow rate of 4 liters per minute, which is particularly beneficial when sampling large volumes of water.
Recovery
After filtration, the module is removed from the housing and placed in the wash station. IDEXX provides both an automatic wash station and a manual version. The foam discs are decompressed by removing a bolt in the module and then washed with an elution buffer using expansion/compression cycles.
The volume of buffer is then reduced to between 25 and 50 mL by concentrating through a membrane, negating the need for high-volume centrifugation.
How to Use Filta-Max®
Filta-Max Questions and Answers
Is Filta-Max approved by the U.S. EPA? Yes. In April 2000, the U.S. Environmental Protection Agency (EPA) approved the Filta-Max system for use in Method 1623. Does Filta-Max have any other approvals? Yes, Filta-Max is also approved by the UK government for the regulatory sampling of 1,000 liters drinking water. What volumes of water can be filtered using Filta-Max? The system is efficient for both raw and finished water. The filter has been approved for sampling 50 liters of raw water in Method 1623 by the US EPA. Other U.S .EPA-approved filters are limited to sampling 10 liters of raw water. Filta-Max is approved in the UK for sampling 1,000 liters of finished water. What flow rates can be achieved with Filta-Max? Filta-Max can operate at a flow rate of up to 4 liters per minute. What are the recommended pressures for sampling? A minimum pressure of 7.5 psi is required. 50–75 psi is the recommended sampling pressure. What are the shelf life and storage conditions for the IDEXX Filta-Max filter module? The shelf life is 12 months from the date of manufacture. Store module in a dry place (16–24°C), away from direct sunlight. Do not freeze. Do not refrigerate prior to use. How should the filter be transported? The filter should be transported either in the reusable housing or in a water-tight resealable bag along with several milliliters of reagent-grade water. What recoveries can be achieved with Filta-Max? Recoveries greater than 70% can be consistently achieved. How does the cost of Filta-Max compare with other filters on the market? Filta-Max is approximately half the cost of other U.S. EPA-approved filters. What is the variability of the method? Variability is low. Relative standard deviations are up to 50% lower than other U.S. EPA-approved filters. |
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