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Evaluating the use of 3'-(p-Aminophenyl) fluorescein for determining the formation of highly reactive oxygen species in particle suspensions

BACKGROUND: Given the importance of highly reactive oxygen species (hROS) as reactants in a wide range of biological, photochemical, and environmental systems there is an interest in detection and quantification of these species. The extreme reactivity of the hROS, which includes hydroxyl radicals,...

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Autores principales: Cohn, Corey A, Pedigo, Christopher E, Hylton, Shavonne N, Simon, Sanford R, Schoonen, Martin AA
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2736975/
https://www.ncbi.nlm.nih.gov/pubmed/19671165
http://dx.doi.org/10.1186/1467-4866-10-8
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author Cohn, Corey A
Pedigo, Christopher E
Hylton, Shavonne N
Simon, Sanford R
Schoonen, Martin AA
author_facet Cohn, Corey A
Pedigo, Christopher E
Hylton, Shavonne N
Simon, Sanford R
Schoonen, Martin AA
author_sort Cohn, Corey A
collection PubMed
description BACKGROUND: Given the importance of highly reactive oxygen species (hROS) as reactants in a wide range of biological, photochemical, and environmental systems there is an interest in detection and quantification of these species. The extreme reactivity of the hROS, which includes hydroxyl radicals, presents an analytical challenge. 3'-(p-Aminophenyl) fluorescein (APF) is a relatively new probe used for measuring hROS. Here, we further evaluate the use of APF as a method for the detection of hydroxyl radicals in particle suspensions. RESULTS: Particle-generated hROS can be quantified with an estimated detection limit of 50 nM. Measurements of hROS in two National Institute of Standards and Technology (NIST 2709 and 2710) soil suspensions and a pyrite suspension show non-linear particle dose-response curves for hROS generation. APF can also be used in solutions containing no dissolved molecular oxygen (O(2)) to determine the role of O(2 )in the formation of hROS. Results confirm that O(2 )is mechanistically important in the formation of hROS by dissolved ferrous iron and in pyrite suspensions. CONCLUSION: Given the non-linear dose-response curves for particle generation of hROS, we recommend using several particle loadings in experiments aimed to compare particles for their hROS generation potential. The method presented here is specific to hROS and simple to perform. The analysis can be conducted in mobile labs as only basic laboratory equipment is required.
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spelling pubmed-27369752009-09-03 Evaluating the use of 3'-(p-Aminophenyl) fluorescein for determining the formation of highly reactive oxygen species in particle suspensions Cohn, Corey A Pedigo, Christopher E Hylton, Shavonne N Simon, Sanford R Schoonen, Martin AA Geochem Trans Methodology BACKGROUND: Given the importance of highly reactive oxygen species (hROS) as reactants in a wide range of biological, photochemical, and environmental systems there is an interest in detection and quantification of these species. The extreme reactivity of the hROS, which includes hydroxyl radicals, presents an analytical challenge. 3'-(p-Aminophenyl) fluorescein (APF) is a relatively new probe used for measuring hROS. Here, we further evaluate the use of APF as a method for the detection of hydroxyl radicals in particle suspensions. RESULTS: Particle-generated hROS can be quantified with an estimated detection limit of 50 nM. Measurements of hROS in two National Institute of Standards and Technology (NIST 2709 and 2710) soil suspensions and a pyrite suspension show non-linear particle dose-response curves for hROS generation. APF can also be used in solutions containing no dissolved molecular oxygen (O(2)) to determine the role of O(2 )in the formation of hROS. Results confirm that O(2 )is mechanistically important in the formation of hROS by dissolved ferrous iron and in pyrite suspensions. CONCLUSION: Given the non-linear dose-response curves for particle generation of hROS, we recommend using several particle loadings in experiments aimed to compare particles for their hROS generation potential. The method presented here is specific to hROS and simple to perform. The analysis can be conducted in mobile labs as only basic laboratory equipment is required. BioMed Central 2009-08-11 /pmc/articles/PMC2736975/ /pubmed/19671165 http://dx.doi.org/10.1186/1467-4866-10-8 Text en Copyright ©2009 Cohn et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Methodology
Cohn, Corey A
Pedigo, Christopher E
Hylton, Shavonne N
Simon, Sanford R
Schoonen, Martin AA
Evaluating the use of 3'-(p-Aminophenyl) fluorescein for determining the formation of highly reactive oxygen species in particle suspensions
title Evaluating the use of 3'-(p-Aminophenyl) fluorescein for determining the formation of highly reactive oxygen species in particle suspensions
title_full Evaluating the use of 3'-(p-Aminophenyl) fluorescein for determining the formation of highly reactive oxygen species in particle suspensions
title_fullStr Evaluating the use of 3'-(p-Aminophenyl) fluorescein for determining the formation of highly reactive oxygen species in particle suspensions
title_full_unstemmed Evaluating the use of 3'-(p-Aminophenyl) fluorescein for determining the formation of highly reactive oxygen species in particle suspensions
title_short Evaluating the use of 3'-(p-Aminophenyl) fluorescein for determining the formation of highly reactive oxygen species in particle suspensions
title_sort evaluating the use of 3'-(p-aminophenyl) fluorescein for determining the formation of highly reactive oxygen species in particle suspensions
topic Methodology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2736975/
https://www.ncbi.nlm.nih.gov/pubmed/19671165
http://dx.doi.org/10.1186/1467-4866-10-8
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