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How should I store opened microplates if I do not use all the wells at once?

Opened plates are sensitive to storage conditions:

  • It is essential to immediately close the aluminium envelope after opening. 
  • Do not throw away the desiccant: the plate should be sealed with the desiccant inside the envelope. This should be carried out rapidly, as the desiccant will quickly absorb humidity and become inactivated after 10-30 minutes.
  • The end of the aluminium envelope should be cut with scissors and closed in an air-tight manner along the entire length of the envelope, with scotch tape, for example. (Simply folding-over the edges and/or stapling is insufficient to ensure sealing.). Please refer to the photos on the document Plate storage.pdf
  • Store at 5°C ± 3°C.

What is the shelf-life of the freeze-dried serum standards (product codes beginning with “MRI”)?

We do not indicate an exact expiry date because these sera are very stable over time thanks to their freeze-dried form.

You may consider that they can be kept for up to 10 years from the production date (indicated in the upper right-hand corner of the product sheet). Store freeze-dried at +2° – 26°C.

For information regarding storage in the reconstituted (liquid) form, please refer to the product sheet.

In general, liquid sera should be stored as follows:

  • Store at -20°C in aliquots after reconstitution.
  • Never freeze/thaw more than 3 times.
  • If reconstituted, store at +4°C for up to 2 days.

Once reconstituted, the sera should be aliquoted and stored in air-tight vials (preferably with a twist cap, such as a cryotube). Otherwise, auto-lyophilisation may occur within 6-12 months at -20°C.