Collecting microdialysis manually or in a fraction collector are common ways of obtaining samples for analysis.
The Sample Vials fit with most fraction collectors used in microdialysis. They also work in many HPLC autosamplers directly or via using vial inserts. Typically the vials can hold max 300µl of volume which usually is far more than needed for sample collection. Two types are available depending on what type of sample that is to be collected.
The Polystyrene version is similar to glass in appearance and also in characteristics. Good properties regarding minimal sample loss due to evaporation, critical when collecting small volumes at low flow rates. The Polypropylene version is known for being non ”sticky” which make them better suited for compounds that tend to attach to materials.
The vials can be used for collecting sample with or without the re-sealing caps. If using a fraction collector for the sampling some units can be configured for the use of caps. It is also possible to put on aluminum type of crimp caps with separate septas. A clear advantage of using re-sealing caps is that air cannot enter into the vial after the sample collection has been completed. A sharp steel cannula will slide through the Santopren in the cap which will seal back once the cannula is withdrawn. The cannula reaches the bottom of the vial so that even small volumes of samples can be collected. Vials and caps stand freezing and we recommend that he vials are stored in the freezer in a standing position.