Detecting hydrogen peroxide reliably in water via ion chromatography: a method evaluation update and comparison in the presence of interfering components,Environmental Science: Water Research & Technology

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Detecting hydrogen peroxide reliably in water via ion chromatography: a method evaluation update and comparison in the presence of interfering components
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2020-06-11 , DOI: 10.1039/d0ew00234h
Yuanxi Huang _{1,

2,

3,

4} , Lei Wang _{1,

2,

3,

4} , Baiyang Chen _{1,

2,

3,

4} , Qi Zhang _{1,

2,

3,

4} , Rongshu Zhu _{1,

2,

3,

4}

Affiliation

Hydrogen peroxide (H₂O₂) is an oxidant/additive widely used in water oxidation processes but not commonly detected due to lack of reliable analytical methods in faces of complex water matrixes. In this study, we made an evaluation update and compared the performances of a recently established analytical method, which uses ion chromatography (IC), with a conventional spectrophotometric method on detecting H₂O₂ under various water conditions. The results indicated that the IC method has a wider calibration scope (0.01–10.0 mg L⁻¹, R² ≥ 0.998), more consistent slopes (≤2.4% variation), and a lower method detection limit (2.1 μg L⁻¹) than the colorimetric method (0.03–10.0 mg L⁻¹, R² ≥ 0.987, ≤14.4% variation, and 16.4 μg L⁻¹). More importantly, the IC method was less subject to interferences from varying reaction time and dissolved oxygen, nitrite, ferric ions, and humic acid contents, thus demonstrating its superiority over the conventional colorimetric method in face of coexisting interferents. Although the IC method has certain drawbacks, such as inconvenience for field use, underestimation of data at pH ≥ 12.4, and IC column clogging by precipitative cations, they can generally be overcome by sample pretreatment and hand-held IC. Partially due to the formation of nitrite, the colorimetric method obtained higher H₂O₂ values than the IC method from a real tap water photolyzed by ultraviolet (UV), vacuum UV, and UV activated H₂O₂, thus highlighting the importance of choosing an appropriate method to obtain a reasonable trend. The evaluation and comparison of the two H₂O₂ analytical methods may help facilitate their applications in different operational and environmental conditions.

中文翻译：

通过离子色谱法可靠地检测水中过氧化氢：在存在干扰组分的情况下方法评估更新和比较

过氧化氢（H ₂ O ₂）是一种氧化剂/添加剂，广泛用于水氧化过程中，但由于在复杂的水基质表面缺乏可靠的分析方法而未被广泛检测。在这项研究中，我们进行了评估更新，并比较了最近建立的使用离子色谱（IC）和常规分光光度法在各种水质条件下检测H ₂ O _2的分析方法的性能。结果表明，在IC方法具有更宽范围的校准（0.01-10.0毫克的L ^-1，- [R ² ≥0.998），更一致的斜率（≤2.4％的变化），和下方法检测限（2.1微克大号^-1）比比色法（0.03-10.0毫克的L ^-1，- [R ² ≥0.987，≤14.4％的变化，和16.4微克大号^-1）。更重要的是，IC方法受反应时间的变化以及溶解氧，亚硝酸盐，三价铁离子和腐殖酸含量的干扰较小，因此面对共存的干扰物，它比常规比色法更具优势。尽管离子色谱法有某些缺点，例如给现场使用带来不便，pH≥12.4时数据的低估以及沉淀阳离子对离子色谱柱的堵塞，但通常可以通过样品预处理和手持式离子色谱法来克服。比色法部分由于亚硝酸盐的形成而获得了更高的H ₂ O ₂实际值比通过紫外线（UV），真空紫外线和紫外线活化的H ₂ O ₂光解的实际自来水的IC方法的值高，因此突出了选择适当方法以获得合理趋势的重要性。两种H ₂ O ₂分析方法的评估和比较可能有助于促进它们在不同操作和环境条件下的应用。

更新日期：2020-06-11

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