Dissolution Filters | Cannula Filters

Dissolution filters, often referred to as cannula filters, are essential components in dissolution testing, ensuring that only dissolved substances are sampled from the dissolution media. These filters come in various porosities and materials to cater to different testing requirements and ensure compatibility with various dissolution apparatus brands.

Types of Dissolution Filters

Dissolution filters are available in a range of porosities from 1 micron to 70 microns, catering to diverse testing needs. The porosity selected can significantly impact the accuracy and reliability of your dissolution testing. For example, a filter with too high porosity might allow undissolved particles to pass through, affecting your results by giving falsely high readings. On the contrary, a filter with too low porosity might impede the flow rate and cause cavitation in automated systems.

Materials and Compatibility

Filters are primarily made from  ultra-high molecular weight polyethylene (UHMWPE)  or  polyvinylidene fluoride (PVDF) . These materials are chosen for their inert properties and compatibility with various dissolution media. UHMWPE filters are versatile and suitable for most applications, while PVDF filters are used when chemical compatibility or sample adsorption is a concern. 

Both types of filters are designed to fit a range of dissolution apparatus, including Agilent, VanKel, Varian, Distek, and others.

Dissolution Filters (Cannula Filters) Product Range

A comprehensive range of dissolution filters includes:

  1. Full Flow Filters:  Made entirely from filter material, these filters provide a larger surface area for filtration, reducing the risk of clogging.

  2. Porous Filters:  Available in various porosities and materials, designed to fit specific apparatus brands and models.

  3. Filter Tips and Discs:  Suitable for different sampling requirements, ensuring precise and reliable sample collection.

Key Products:


Product Name/Part Number

Product Description Product Link

SF-17-4005

10 Micron Full Flow Filters, UHMW Polyethylene (Jar/1000)
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SF-17-4000-100

10 Micron Porous Filters, UHMW Polyethylene, Agilent compatible/VanKel/Varian compatible (Pack/100). Also used in Distek DV Series Probe housing.
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SF-17-4015

35 Micron Porous Filters, UHMW Polyethylene, Agilent compatible/VanKel/Varian compatible (Jar/1000). Also used in Distek DV Series Probe housing.
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SF-17-4020


70 Micron Full Flow Filters, UHMW Polyethylene (Pack/100)
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Explore Our Products

Explore our comprehensive range of products to discover high-quality, certified filters that ensure reliable and accurate dissolution testing results.

Frequently Asked Questions

Dissolution filters, also known as cannula filters, are used in dissolution testing to ensure that only dissolved substances are sampled from the dissolution media. They come in various porosities and materials to meet different testing requirements.

Dissolution filters are available in a range of porosities from 1 micron to 70 microns. They include full flow filters, porous filters, and filter tips and discs, designed to fit specific dissolution apparatus brands and models.

Dissolution filters are primarily made from ultra-high molecular weight polyethylene (UHMWPE) or polyvinylidene fluoride (PVDF). These materials are chosen for their inert properties and compatibility with various dissolution media.

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