The Zefon Solu‐SertTM filter capsule is a self‐contained filter “cassette capsule” that captures all particles collected by a filter cassette. It consists of an MCE filter membrane sealed to a cellulose shell to create the capsule. This capsule is then inserted into a Zefon 2‐Piece filter cassette with a
support pad as a complete unit. After sampling the entire capsule is removed, digested in an acid solution, and then analysis performed. This process eliminates the need to rinse or wipe the cassette interior to account for "wall deposits" and makes it ideal for performing airborne metals analysis.
Benefits
- Recommended by NIOSH as a viable method of accounting for cassette wall deposits.
- All particulate entering the cassette is collected and captured within the filter insert.
- Easier to process in the laboratory than rinsing or wiping cassette walls.
- Lightweight design keeps the content of cellulose acetate plastic used low, contributing to less background and improved limit of detection.
- More reliable than rinsing internal cassette walls [8]
- Less time consuming than wiping. Studies have shown it can sometimes take more than 1 wipe to effectively account for the entire sample.
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