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Miniature multiwavelength deep UV-LED-Based absorption detection system for capillary LC


Hemida, M and Coates, LJ and Lam, S and Gupta, V and Macka, M and Wirth, H-J and Gooley, AA and Haddad, PR, Miniature multiwavelength deep UV-LED-Based absorption detection system for capillary LC, Analytical Chemistry, 92 pp. 13688-13693. ISSN 0003-2700 (2020) [Refereed Article]

Copyright Statement

Copyright 2020 American Chemical Society

DOI: doi:10.1021/acs.analchem.0c03460


A new miniature deep UV absorbance detector has been developed using low-cost and high-performance LEDs, which can be operated in both scanning (230 to 300 nm) and individual wavelength (240, 255, and 275 nm) detection modes. The detector is mostly composed of off-the-shelf components, such as LEDs, trifurcated fiber optic assembly, a capillary Z-type flow cell, and photodiodes. It has been characterized for use with a standard capillary LC system and was benchmarked against a standard variable wavelength capillary LC detector. The detector shows very low levels of stray light (<0.4%), utilization of up to 99.0% of the effective path length of the flow cell, a wide dynamic range (0.5 to 200 μg/mL for sulfamethazine, carbamazepine, and flavone), and low noise levels (at 300 μAU level). The detector was applied within a miniaturized LC system.

Item Details

Item Type:Refereed Article
Keywords:Multiwavelength, deep UV absorbance, detection systems, high-performance LEDs, capillary LC
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Instrumental methods (excl. immunological and bioassay methods)
Objective Division:Economic Framework
Objective Group:Management and productivity
Objective Field:Technological and organisational innovation
UTAS Author:Hemida, M (Mr Mohamed Hemida)
UTAS Author:Coates, LJ (Mr Lewellwyn Coates)
UTAS Author:Lam, S (Mr Shing Chung Lam)
UTAS Author:Gupta, V (Dr Vipul Gupta)
UTAS Author:Macka, M (Professor Mirek Macka)
UTAS Author:Haddad, PR (Professor Paul Haddad)
ID Code:151635
Year Published:2020
Web of Science® Times Cited:8
Deposited By:Chemistry
Deposited On:2022-08-02
Last Modified:2022-09-08

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