Issue 3, 2023

Mixture design of an electrolyte system for the simultaneous separation of Cl, SO42−, NO3, NO2, and HCO3 in shrimp-farming water by CZE-UV

Abstract

Shrimp is one of the most traded fishery products in the world. The shrimp-farming water ionic composition is fundamental to the growth and survival of these specimens. Therefore, this study is aimed to develop a method for the simultaneous separation of Cl, SO42−, NO3, NO2, and HCO3 in this sample by capillary zone electrophoresis with UV indirect detection, without any prior sample treatment, besides dilution. The background electrolyte (BGE) was composed of CrO42− (60 mmol L−1), cetyltrimethylammonium bromide (CTAB, 2.5 mmol L−1), acetonitrile (0.875% (v/v)), and methanol (2.625% (v/v)). The mixture design optimized the BGE composition. Acetonitrile and methanol changed the degree of solvation of the anions, which decreased the radius, a phenomenon proven by calculating the radius of anions in all the conditions of the mixture design. The optimized and validated method allowed the simultaneous determination of the five above-mentioned anions in 10 min.

Graphical abstract: Mixture design of an electrolyte system for the simultaneous separation of Cl−, SO42−, NO3−, NO2−, and HCO3− in shrimp-farming water by CZE-UV

Supplementary files

Article information

Article type
Paper
Submitted
04 Okt. 2022
Accepted
12 Dec. 2022
First published
12 Dec. 2022

Anal. Methods, 2023,15, 311-321

Mixture design of an electrolyte system for the simultaneous separation of Cl, SO42−, NO3, NO2, and HCO3 in shrimp-farming water by CZE-UV

M. P. do Nascimento, M. V. Marinho, R. A. D. Sousa and M. A. Leal de Oliveira, Anal. Methods, 2023, 15, 311 DOI: 10.1039/D2AY01619B

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