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EVIDENCE OF SAMPLE STABILITY AT -70C

2/15/2018

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Is there evidence that samples are safe at -70C?

Spoiler alert - YES!  If you've been following My Green Lab, you know that we coined the phrase '-70 is the new -80'.  Adjusting your ultra low temperature freezer set point to -70C can reduce energy consumption by 30-40% and prolong the lifetime of a compressor-based freezer. For years we've been directing people to check out the incredible crowd-sourced document, that Dr. Kathy Ramirez-Aguilar at CU Boulder put together, of samples that have been stored at -70C.  And now, thanks to our collaboration with the European organization EGNATON on the Freezer Challenge, we have been made aware of these two publications, which show sample stability at -70C for yeasts and molds, and the enzyme PON1. Furthermore, suppliers such as GE and Qiagen have updated their storage recommendations to -70C for certain reagents as well.  

The community is still working on obtaining evidence for a wide range of samples - shout out to Martin Farley at Kings College and Amorette Getty at UC Santa Barbara for doing this work - but it's clear the evidence is mounting in favor of safe, sustainable sample storage at -70C.

If you choose to set your ULT freezer to -70C as part of the Freezer Challenge be sure to add your name and your samples to the Google doc!  We would also be happy to add them for you - just email us at info@mygreenlab.org.
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12/23/2022 10:02:31 am

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The Freezer Challenge is a program coordinated by the non-profit organizations
​My Green Lab
® and the International Institute for Sustainable Laboratories, and sponsored by various companies with an interest in promoting the most energy efficient cold storage options.
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  • Register
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    • Award Winners 2022
    • Award Winners 2021
    • Award Winners 2020
    • Award Winners 2019
    • Award Winners 2018
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