On-column radiometric detector for capillary isotachophoresis

D. Kaniansky; P. Rajec; A. Švec; J. Marák; M. Kovaľ; M. Lúčka; Š. Franko; G. Sabanoš

doi:10.1007/bf02039828

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 129: Issue 2

On-column radiometric detector for capillary isotachophoresis

Authors:

D. Kaniansky

D. Kaniansky Komensky University Institute of Chemistry and Department of Nuclear Chemistry, Faculty of Science Mlynská Dolina CH-2 842 15 Bratislava (Czechoslovakia)

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P. Rajec

P. Rajec Komensky University Institute of Chemistry and Department of Nuclear Chemistry, Faculty of Science Mlynská Dolina CH-2 842 15 Bratislava (Czechoslovakia)

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A. Švec

A. Švec Komensky University Institute of Chemistry and Department of Nuclear Chemistry, Faculty of Science Mlynská Dolina CH-2 842 15 Bratislava (Czechoslovakia)

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J. Marák

J. Marák Institute of Radioecology and Applied Nuclear Techniques Chrapčiakova 1 052 80 Spišská Nová Ves (Czechoslovakia)

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M. Kovaľ

M. Kovaľ Institute of Radioecology and Applied Nuclear Techniques Chrapčiakova 1 052 80 Spišská Nová Ves (Czechoslovakia)

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M. Lúčka

M. Lúčka Institute of Radioecology and Applied Nuclear Techniques Chrapčiakova 1 052 80 Spišská Nová Ves (Czechoslovakia)

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Š. Franko

Š. Franko Institute of Radioecology and Applied Nuclear Techniques Chrapčiakova 1 052 80 Spišská Nová Ves (Czechoslovakia)

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G. Sabanoš

G. Sabanoš Institute of Radioecology and Applied Nuclear Techniques Chrapčiakova 1 052 80 Spišská Nová Ves (Czechoslovakia)

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Pages:: 305–325

Online Publication Date:: 13 Aug 2005

Publication Date:: 17 Feb 1989

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02039828

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Abstract

An on-column radiometric detector for capillary isotachophoresis is described. Design of the detector follows its intended use, i.e., mainly the detection of¹⁴C labelled ionogenic compounds separable by this electromigration method. A key part of the detector is a small volume (70 or 200 nl) cell with the sensing part made of plastic scintillator with counting efficiencies of 13–15%. An equation correlating the precision of radioactivity measurements with physical and geometrical characteristics of the cell and isotachophoretic conditions has been derived providing a guide in optimizing both the geometrical dimensions of the cell and the isotachophoretic working conditions. A minimum detectability calculated for¹⁴C radionuclide (21 Bq for a 3 mm thickness of the sensing part of the cell) was in a good agreement with the value determined experimentally (16 Bq). Other parameters evaluated experimentally include resolving power, short- and long-term reproducibilities of the response. It was also shown that optimized driving current during the detection enables to improve the precision of the radioactivity measurement.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)