Interference of dissolved organic matter and its constituents on the accurate determination of hydrogen peroxide in water

Abstract Hydrogen peroxide (H2O2) is ubiquitous in natural waters, and plays an important role in both biological and chemical processes. This study investigated the influence of dissolved organic matter (DOM) and its substituents on the accurate measurement of H2O2 by peroxidase-mediated depletion...

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Autores principales:	Jianbiao Peng, Ya Zhang, Jianhua Li, Xinan Wu, Mengjie Wang, Zhimin Gong, Shixiang Gao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7eacb319ed5445adbfea035472a719b2
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spelling	oai:doaj.org-article:7eacb319ed5445adbfea035472a719b22021-11-21T12:19:04ZInterference of dissolved organic matter and its constituents on the accurate determination of hydrogen peroxide in water10.1038/s41598-021-01016-92045-2322https://doaj.org/article/7eacb319ed5445adbfea035472a719b22021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01016-9https://doaj.org/toc/2045-2322Abstract Hydrogen peroxide (H2O2) is ubiquitous in natural waters, and plays an important role in both biological and chemical processes. This study investigated the influence of dissolved organic matter (DOM) and its substituents on the accurate measurement of H2O2 by peroxidase-mediated depletion of scopoletin fluorescence method which is one of the most widely used methods for the determination of low concentration H2O2 in water. Six DOM and its 24 substituents interfered the determination of H2O2 at environmentally relevant concentration of 200 nM with different levels except 2,6-dimethoxy-1,4-benzoquinone and benzoic acid, which may be associated with origin and types of DOM, and numbers and position of active functional groups in DOM constituents. Each substance concentration and the corresponding decreasing ratio to the measured H2O2 concentration was fitted well to the linear model (R2 > 0.9), and the obtained interfering ratios (k, (mgC L−1)−1), expressing the degree of DOM or its substituents per unit concentration to the measurement of H2O2, were approximate for DOM, but the order of magnitude of k values of DOM constituents took on a large span from 10–3 to 10–7. When DOM levels exceed 0.1 mgC L−1 or its substituent concentration is at nM level (low to 20 nM), the H2O2 content will be underestimated substantially. A quantitative structure–activity relationship model with remarkable stability and strong predictability for the k of DOM substituents to H2O2 measurement was established, and the k was related to the electron transfer capacity, hydrophobicity and stability of these compounds.Jianbiao PengYa ZhangJianhua LiXinan WuMengjie WangZhimin GongShixiang GaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jianbiao Peng Ya Zhang Jianhua Li Xinan Wu Mengjie Wang Zhimin Gong Shixiang Gao Interference of dissolved organic matter and its constituents on the accurate determination of hydrogen peroxide in water
description	Abstract Hydrogen peroxide (H2O2) is ubiquitous in natural waters, and plays an important role in both biological and chemical processes. This study investigated the influence of dissolved organic matter (DOM) and its substituents on the accurate measurement of H2O2 by peroxidase-mediated depletion of scopoletin fluorescence method which is one of the most widely used methods for the determination of low concentration H2O2 in water. Six DOM and its 24 substituents interfered the determination of H2O2 at environmentally relevant concentration of 200 nM with different levels except 2,6-dimethoxy-1,4-benzoquinone and benzoic acid, which may be associated with origin and types of DOM, and numbers and position of active functional groups in DOM constituents. Each substance concentration and the corresponding decreasing ratio to the measured H2O2 concentration was fitted well to the linear model (R2 > 0.9), and the obtained interfering ratios (k, (mgC L−1)−1), expressing the degree of DOM or its substituents per unit concentration to the measurement of H2O2, were approximate for DOM, but the order of magnitude of k values of DOM constituents took on a large span from 10–3 to 10–7. When DOM levels exceed 0.1 mgC L−1 or its substituent concentration is at nM level (low to 20 nM), the H2O2 content will be underestimated substantially. A quantitative structure–activity relationship model with remarkable stability and strong predictability for the k of DOM substituents to H2O2 measurement was established, and the k was related to the electron transfer capacity, hydrophobicity and stability of these compounds.
format	article
author	Jianbiao Peng Ya Zhang Jianhua Li Xinan Wu Mengjie Wang Zhimin Gong Shixiang Gao
author_facet	Jianbiao Peng Ya Zhang Jianhua Li Xinan Wu Mengjie Wang Zhimin Gong Shixiang Gao
author_sort	Jianbiao Peng
title	Interference of dissolved organic matter and its constituents on the accurate determination of hydrogen peroxide in water
title_short	Interference of dissolved organic matter and its constituents on the accurate determination of hydrogen peroxide in water
title_full	Interference of dissolved organic matter and its constituents on the accurate determination of hydrogen peroxide in water
title_fullStr	Interference of dissolved organic matter and its constituents on the accurate determination of hydrogen peroxide in water
title_full_unstemmed	Interference of dissolved organic matter and its constituents on the accurate determination of hydrogen peroxide in water
title_sort	interference of dissolved organic matter and its constituents on the accurate determination of hydrogen peroxide in water
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7eacb319ed5445adbfea035472a719b2
work_keys_str_mv	AT jianbiaopeng interferenceofdissolvedorganicmatteranditsconstituentsontheaccuratedeterminationofhydrogenperoxideinwater AT yazhang interferenceofdissolvedorganicmatteranditsconstituentsontheaccuratedeterminationofhydrogenperoxideinwater AT jianhuali interferenceofdissolvedorganicmatteranditsconstituentsontheaccuratedeterminationofhydrogenperoxideinwater AT xinanwu interferenceofdissolvedorganicmatteranditsconstituentsontheaccuratedeterminationofhydrogenperoxideinwater AT mengjiewang interferenceofdissolvedorganicmatteranditsconstituentsontheaccuratedeterminationofhydrogenperoxideinwater AT zhimingong interferenceofdissolvedorganicmatteranditsconstituentsontheaccuratedeterminationofhydrogenperoxideinwater AT shixianggao interferenceofdissolvedorganicmatteranditsconstituentsontheaccuratedeterminationofhydrogenperoxideinwater
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Interference of dissolved organic matter and its constituents on the accurate determination of hydrogen peroxide in water

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