In this study, ion-exclusion/cation-exchange chromatography (IEC/CEC) using dual-ion-exchange groups (carboxy and sulfo groups) for the simultaneous determination of anions (SO₄²⁻, Cl⁻, NO₃⁻, and HPO₄²⁻) and cations (Na⁺, NH₄⁺, K⁺, Mg²⁺, and Ca²⁺) was developed. By using the combination of dual-ion-exchange groups, simultaneous separation of inorganic ions with HPO₄²⁻ was achieved that was impossible by the conventional IEC/CEC based on the single-ion-exchange group (carboxy group). This method was applied to the monitoring of inorganic ionic nutrients in fertilizer solution samples in hydroponic culture. As a result, a higher peak resolution of inorganic anions and cations with phosphate ion using IEC/CEC with dual-ion-exchange groups was achieved in the absence of matrix effects. In addition, the developed method helps to understand the behavior of ionic nutrients in fertilizer solution during hydroponic cultivation and is potentially useful for the individual fertilization of ionic nutrients.

中文翻译：

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使用双离子交换基团的离子排斥/阳离子交换色谱法同时测定肥料溶液样品中的无机离子营养素，用于管理水培

在本研究中，离子排斥/阳离子交换色谱 (IEC/CEC) 使用双离子交换基团（羧基和磺基）同时测定阴离子（SO ₄ ^{2 -}、Cl ^-、NO ₃ ^-和开发了 HPO ₄ ^{2 -} ) 和阳离子（Na ⁺、NH ₄ ⁺、K ⁺、Mg ^{2 +}和 Ca ^{2 +}）。通过使用双离子交换基团的组合，同时分离无机离子和 HPO ₄ ^{2 -}实现了基于单离子交换基团（羧基）的传统 IEC/CEC 不可能实现的目标。该方法应用于水培栽培肥料溶液样品中无机离子养分的监测。因此，在没有基质效应的情况下，使用具有双离子交换基团的 IEC/CEC 获得了更高的无机阴离子和阳离子与磷酸根离子的峰分辨率。此外，所开发的方法有助于了解在水培过程中肥料溶液中离子营养素的行为，并可能对离子营养素的个体施肥有用。