Determination of inorganic anions in weak acids by using ion exclusion chromatography – capillary ion chromatography switching column techniqueстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 апреля 2019 г.
Аннотация:An improved “heart-cut” column-switching method combining ion-exclusion column, monolithic anion exchange concentrator and capillary anion-exchange column is developed and successfully applied for the determination of inorganic anions (Cl-, Br-, NO3- and HPO42-) at trace level in weak acids. The quantitative determination of selected inorganic anions in the samples of
fifteen weak acids and hydrogen peroxide are accomplished with analysis time of 45 min per
sample. The obtained limits of detection (LODs) are in the range of 2.1-32.6 ng/L based on the s/n = 3 and injection volume of 50 μL. RSDs for retention time and peak area were all ≤ 1.89%. A spike-recovery study was performed under these conditions and satisfactory recoveries between
85.3 and 103.9% for all studied anions were obtained.