Open tubular capillary ion chromatography with online dilution for small ions determination in drinks

Tinakorn Kanyanee; Kanlayarat Tianrungarun; Wasin Somboot; Chanida Puangpila; Jaroon Jakmunee

doi:10.1016/j.foodchem.2022.132055

Open tubular capillary ion chromatography with online dilution for small ions determination in drinks

Food Chem. 2022 Jul 15:382:132055. doi: 10.1016/j.foodchem.2022.132055. Epub 2022 Jan 4.

Authors

Tinakorn Kanyanee¹, Kanlayarat Tianrungarun², Wasin Somboot², Chanida Puangpila³, Jaroon Jakmunee⁴

Affiliations

¹ Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center of Excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai 50200, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand. Electronic address: tinakorn.kanyanee@cmu.ac.th.
² Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; The Graduate School, Chiang Mai University, Chiang Mai 50200, Thailand.
³ Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
⁴ Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center of Excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai 50200, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.

PMID: 35255354
DOI: 10.1016/j.foodchem.2022.132055

Abstract

This work aims to develop a more robust, easy-to-use, low-pressure, and cost-effective nonsuppressed open tubular capillary ion chromatography (NS-OTIC) approach with online dialysis for small ions determination in drinks. The fabricated device was applied for two selected columns, including poly(butadiene-maleic acid) on a 50-μm bore and AS18 Latex on 25-µm bore fused silica capillaries, for the separation of mixed cations (Na⁺, K⁺, Ca²⁺, Mg²⁺) and mixed anions (Cl^-, Br^-, NO₂^-, NO₃^-), respectively. High concentrations of ions (up to 100 mM) level can be directly introduced into the NS-OTIC system without an off-line (manual) dilution step. The linear relationship of the peak area and concentration of model ions can be obtained with a resolution > 1.1. The repeatability of the peak area for both OTIC columns was < 6% RSD. Juice and tea samples were successfully analyzed with % recoveries of 77-112 and 90-119 for cation and anion determinations, respectively.

Keywords: Drinks; Ions determination; Online dialysis; Open tubular capillary ion chromatograph.

MeSH terms

Anions / analysis
Cations / analysis
Chromatography, Ion Exchange / methods
Renal Dialysis*
Silicon Dioxide*

Substances

Anions
Cations
Silicon Dioxide