Development of a background electrolyte for the determination of inorganic cations in high ionic strength samples by capillary electrophoresis with indirect UV-absorption detection

Abstract

This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Capillary electromigration methods for food analysis and Foodomics: Advances and applications in the period March 2021 to March 2023

“…To simplify this kind of analysis, Lancioni et al. developed a simple and fast CE–UV method for the analysis of inorganic cations in very high ionic strength samples like soy sauce and isotonic drinks [83]. The key parameter for this method was the composition of the BGE.…”

Application of Capillary Electrophoresis for Determination of Inorganic Analytes in Waters

“…Several applications have been reported for inorganic cations with indirect UV detection in low ionic strength samples, such as tap water [17][18][19], wastewater [19], mineral water [18] and diluted high ionic strength sea water samples [20]. In indirect determinations of cations, pyridine [17], 2,4-trimethylpyridine [20], and benzimidazole [18] were recently reported as satisfactory UV probes.…”

“…Several applications have been reported for inorganic cations with indirect UV detection in low ionic strength samples, such as tap water [17][18][19], wastewater [19], mineral water [18] and diluted high ionic strength sea water samples [20]. In indirect determinations of cations, pyridine [17], 2,4-trimethylpyridine [20], and benzimidazole [18] were recently reported as satisfactory UV probes. For the separation of inorganic cations, in order to selectively modify their similar mobility for a better resolution, the addition of complexing ligands to BGE can be effective, which was reported e.g., with the use of 18-crown-6-ether [17][18][19] or lactate [20].…”

“…In indirect determinations of cations, pyridine [17], 2,4-trimethylpyridine [20], and benzimidazole [18] were recently reported as satisfactory UV probes. For the separation of inorganic cations, in order to selectively modify their similar mobility for a better resolution, the addition of complexing ligands to BGE can be effective, which was reported e.g., with the use of 18-crown-6-ether [17][18][19] or lactate [20]. For instance, CE determination with indirect UV detection was reported for the determination of NH 4 + , Na + , K + , Ca 2+ , Mg 2+ and Cu 2+ cations and Cl − , NO 3 − and SO 4 2− anions at mg L −1 levels in cold and hot tap waters supplied to households by installations made of copper, plastic and steel water supply pipes [17].…”

“…Due to its very high salinity, and large differences in the concentration levels of different inorganic ions, the CE analysis of sea water is a much more challenging task. The development of a BGE applicable to the determination of inorganic cations in high ionic strength samples by CE with indirect UV-absorption detection has been reported very recently [20]. Several small-molecule carboxylic acids, as well as several toluidines and pyridines were tested as complexing agents and chromophoric probes, respectively.…”