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Positive Temperature Coefficient Compensating Heating for Analytical Devices


Gras, R and Luong, J and Pursch, M and Shellie, RA, Positive Temperature Coefficient Compensating Heating for Analytical Devices, Analytical Chemistry, 90 pp. 6426-6430. ISSN 0003-2700 (2018) [Refereed Article]

Copyright Statement

Copyright 2018 American Chemical Society

DOI: doi:10.1021/acs.analchem.8b01229


Positive temperature coefficient thermistors acting as heating devices are quickly growing in popularity and are being adapted into critical applications in many sectors from medical to space discovery. Positive temperature coefficient heating offers substantial benefits for miniaturized and portable analytical devices in key aspects such as energy efficiency, safety in overheating, size, scalability, and in discovering new thermal management strategies. These heaters can reach 230 °C without additional requirements for regulating electronics. By incorporating positive temperature coefficient technology into a commercial diode array photometric detector, the detector is made suitable for coupling with gas chromatography. The detector cartridge flow cell is heated to a specific target temperature within the range of 70 to 150 °C without impacting the detector’s construction material or imparting any negative effect to the surrounding detector system electronics. Applying a temperature of 150 °C to the cell permits analysis of volatile and semivolatile compounds with a boiling point equivalent to that of n-hexadecene (285 °C). Model compounds of alkene homologues from C8 to C16 showed a maximum peak asymmetry of 1.10 with the heated cell design. A high degree of repeatability was observed with RSD of less than 0.01% in retention time and 3% in peak area (n = 10).

Item Details

Item Type:Refereed Article
Keywords:Analytical devices, positive temperature coefficient, heating, thermistors, heating devices
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Gras, R (Ms Ronda Gras)
UTAS Author:Luong, J (Mr Jim Luong)
UTAS Author:Shellie, RA (Professor Robert Shellie)
ID Code:151553
Year Published:2018
Web of Science® Times Cited:9
Deposited By:Chemistry
Deposited On:2022-08-01
Last Modified:2022-09-08

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