Determination of iodide in concentrated chloride springs by reversed-phase high-performance liquid chromatography with ultraviolet detection

IF 2 4区化学 Q3 CHEMISTRY, ANALYTICAL Analytical Sciences Pub Date : 2025-02-23 DOI:10.1007/s44211-025-00732-w

Tomoko Kemmei, Azusa Yudo, Shuji Kodama, Atsushi Yamamoto, Yoshinori Inoue, Shigehiro Kagaya, Kazuichi Hayakawa

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Abstract

We developed a convenient and simple reversed-phase high-performance liquid chromatographic (RP-HPLC) method for analysis of iodide in concentrated chloride springs. Using a C18 column, the iodide and chloride peaks were well separated. Setting the wavelength at 240 nm allows direct ultraviolet (UV) detection of iodide without any UV or Schlieren effect due to the high chloride concentration. The high ionic strength of spring samples containing high levels of sodium chloride broadens the iodide peak. Iodide was quantified based on the peak areas of standard solutions of iodide, in which 100 mM sodium chloride was added to match the saline matrixes with the samples. The detection limit of iodide at a signal-to-noise ratio of 3 was 0.0003 mM. The detector response was linear over the concentration ranges of 0.001–0.1 mM. The proposed RP-HPLC/UV method was successfully applied to determine iodide in some concentrated chloride spring samples.

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反相高效液相色谱-紫外检测法测定浓氯化物泉中的碘。

建立了一种方便、简便的反相高效液相色谱（RP-HPLC）分析浓氯化物泉水中碘化物的方法。使用C18色谱柱，碘化物和氯化物峰被很好地分离。将波长设置为240 nm，可以直接紫外线（UV）检测碘化物，而不会由于氯浓度高而产生任何紫外线或纹影效应。含有高水平氯化钠的弹簧样品的高离子强度使碘化物峰变宽。碘化物的定量依据碘化物标准溶液的峰面积，在标准溶液中加入100 mM氯化钠，使盐基质与样品相匹配。在信噪比为3的条件下，碘化物的检出限为0.0003 mM，在0.001 ~ 0.1 mM的浓度范围内，检测器的响应呈线性关系。

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来源期刊

Analytical Sciences 化学-分析化学

CiteScore

2.90

自引率

18.80%

发文量

232

审稿时长

1 months

期刊介绍： Analytical Sciences is an international journal published monthly by The Japan Society for Analytical Chemistry. The journal publishes papers on all aspects of the theory and practice of analytical sciences, including fundamental and applied, inorganic and organic, wet chemical and instrumental methods. This publication is supported in part by the Grant-in-Aid for Publication of Scientific Research Result of the Japanese Ministry of Education, Culture, Sports, Science and Technology.