Envirochek® and Envirochek HV Sampling CapsulesEnvirochek capsules are used for collection and recovery of Cryptosporidium oocysts and Giardia cysts in both finished and source water, including surface water, municipal water supplies, samples in containers, or wells.
- Envirochek capsules are validated and listed in U.S. EPA Methods 1622 and 1623, and used for sampling source water for Cryptosporidium and Giardia. Together, the EPA method and Envirochek capsule present a major improvement over the previous string wound cartridge method. The Envirochek capsule is also listed in ISO/DIS 15553.
- Envirochek HV capsules are designed for sampling up to 1,000 liters or more of treated water and validated for up to 50 liters of source water. The Envirochek HV incorporates a track etched membrane designed to process high volumes of treated water while maintaining high recovery characteristics (see Tables 1 and 2) and meeting U.S. EPA requirements. Envirochek HV capsules are also approved by the United Kingdom DWI standard operating protocols for monitoring drinking water for Cryptosporidium.
In the Envirochek sampling capsule method, the water sample to be tested is passed through the capsule either by sampling at the source or by taking a “grab” sample back to the laboratory and filtering it on the bench top. The capsule is then filled with an elution solution, placed on a laboratory shaker, and vigorously shaken to elute any captured oocysts and cysts. Up to eight capsules can be processed at once using Pall’s Laboratory Shaker. The elution solution is decanted and centrifuged to a pellet for further examination by the user’s method of choice.
Table 3 under the Performance tab shows the time savings from using the patented Envirochek sampling capsule and method. This simple process saves time and money by reducing steps and allowing the technician to attend to other tasks. The disposable capsule eliminates the arduous cleaning required by other products that use reusable filter housings.