Cryopreservation without dry ice-induced acidification during sample transport

Jian Wern Ong, Tristan Minifie, Eric Shen Lin, Hassan Ali Abid, Oi Wah Liew, Tuck Wah Ng

Research output: Contribution to journalArticleResearchpeer-review


Dry ice (solid CO2) remains highly useful when temperature-sensitive biological samples need to be cryogenically transported. CO2 released during the sublimation of dry ice can diffuse through gas permeable receptacle material or any defective seals resulting in potential sample acidification and compromised integrity. In addition, the quality of cryopreservation can be undermined once the dry ice is exhausted. The dry ice carrier design described here has been demonstrated to prevent sublimated CO2 from reaching the samples while maintaining storage temperature below −60 °C for 19 h. It is also equipped with microcontroller-based temperature monitoring for traceability and CO2 gas monitoring for safety.

Original languageEnglish
Article number113906
Number of pages5
JournalAnalytical Biochemistry
Publication statusPublished - 1 Nov 2020


  • Carbon dioxide
  • Cryogenic
  • Dry ice
  • Temperature
  • Transport

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