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A simple ice nucleation spectrometer

journal contribution
posted on 2023-05-18, 09:10 authored by Wharton, DA, Mutch, JS, Peter Wilson, Marshall, CJ, Lim, M
The construction of a simple ice nucleation spectrometer is described. It uses 10 μl droplets loaded into glass capillary tubes which are then inserted into an aluminium holder. Each holder takes six capillary tubes surrounding a central thermocouple. Four holders are placed into a cooling block, cooled by fluid from a programmable refrigerated circulator, and the thermocouples interfaced to a computer to record temperatures. Freezing of each sample is detected by an exotherm on the temperature recording, with 24 samples recorded per run. The spectrometer was tested using deionized water, an extract from a New Zealand alpine cockroach and an extract of lawn grass. The cockroach extract is estimated to contain about 103 more nucleators, active at -5°C, than the grass extract.

History

Publication title

Cryoletters

Volume

25

Issue

5

Pagination

335-340

ISSN

0143-2044

Department/School

College Office - College of Health and Medicine

Publisher

Cryo Letters

Place of publication

C/O Royal Veterinary College, Royal College St, London, England, Nw1 0Tu

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

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