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Dawidowicz AL, Matusewicz J, Wysocka-Lisek J. Determination of residual boron in thermally treated controlled-porosity glasses, by colorimetry, spectrography and isotachophoresis. Talanta. 1989;36(5):581-4doi: 10.1016/0039-9140(89)80127-4.
Dawidowicz, A. L., Matusewicz, J., & Wysocka-Lisek, J. (1989). Determination of residual boron in thermally treated controlled-porosity glasses, by colorimetry, spectrography and isotachophoresis. Talanta, 36(5), 581-4. https://doi.org/10.1016/0039-9140(89)80127-4
Dawidowicz, A L, et al. "Determination of residual boron in thermally treated controlled-porosity glasses, by colorimetry, spectrography and isotachophoresis." Talanta vol. 36,5 (1989): 581-4. doi: https://doi.org/10.1016/0039-9140(89)80127-4
Dawidowicz AL, Matusewicz J, Wysocka-Lisek J. Determination of residual boron in thermally treated controlled-porosity glasses, by colorimetry, spectrography and isotachophoresis. Talanta. 1989 May;36(5):581-4. doi: 10.1016/0039-9140(89)80127-4. PMID: 18964760.
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Talanta. 1989 May;36(5):581-4. doi: 10.1016/0039-9140(89)80127-4.

Determination of residual boron in thermally treated controlled-porosity glasses, by colorimetry, spectrography and isotachophoresis.

Talanta

A L Dawidowicz, J Matusewicz, J Wysocka-Lisek

Affiliations

  1. Institute of Chemistry, Maria Curie-Sk?odowska University, M. Curie-Sk?odowska Sq.3, 20031 Lublin, Poland.

PMID: 18964760 DOI: 10.1016/0039-9140(89)80127-4

Abstract

Controlled-porosity glasses (CPGs) are often applied as sorbents in chromatography. Besides having high thermal, chemical and mechanical resistance they are characterized by a very narrow pore-size distribution and the choice of mean pore diameter and porosity covers a wide range. In spite of these advantages, their range of use in chromatography is restricted because of their strong adsorption properties, which are connected with the presence of residual boron atoms in the porous CPG skeleton. The boron concentration on the CPG surface can be increased by proper thermal treatment. When CPGs are heated in the range 400-800 degrees the residual boron atoms in the network diffuse from the bulk to the surface. The paper discusses the boron content in porous glasses of different mean pore diameters and the determination of the enrichment of boron on the GPG surface, by three independent methods: colorimetry, spectrography and isotachophoresis.

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