Lab-on-chip analyser for the in situ determination of dissolved manganese in seawater

Abstract A spectrophotometric approach for quantification of dissolved manganese (DMn) with 1-(2-pyridylazo)-2-naphthol (PAN) has been adapted for in situ application in coastal and estuarine waters. The analyser uses a submersible microfluidic lab-on-chip device, with low power (~ 1.5 W) and reagen...

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Autores principales:	Felix Geißler, Eric P. Achterberg, Alexander D. Beaton, Mark J. Hopwood, Mario Esposito, Matt C. Mowlem, Douglas P. Connelly, Douglas Wallace
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/774b2ff07d764865aacafdcfbf6ae7c2
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spelling	oai:doaj.org-article:774b2ff07d764865aacafdcfbf6ae7c22021-12-02T13:24:07ZLab-on-chip analyser for the in situ determination of dissolved manganese in seawater10.1038/s41598-021-81779-32045-2322https://doaj.org/article/774b2ff07d764865aacafdcfbf6ae7c22021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81779-3https://doaj.org/toc/2045-2322Abstract A spectrophotometric approach for quantification of dissolved manganese (DMn) with 1-(2-pyridylazo)-2-naphthol (PAN) has been adapted for in situ application in coastal and estuarine waters. The analyser uses a submersible microfluidic lab-on-chip device, with low power (~ 1.5 W) and reagent consumption (63 µL per sample). Laboratory characterization showed an absorption coefficient of 40,838 ± 1127 L⋅mol−1⋅cm−1 and a detection limit of 27 nM, determined for a 34.6 mm long optical detection cell. Laboratory tests showed that long-term stability of the PAN reagent was achieved by addition of 4% v/v of a non-ionic surfactant (Triton-X100). To suppress iron (Fe) interferences with the PAN reagent, the Fe(III) masking agents deferoxamine mesylate (DFO-B) or disodium 4,5-dihydroxy-1,3-benzenedisulfonate (Tiron) were added and their Fe masking efficiencies were investigated. The analyser was tested during a deployment over several weeks in Kiel Fjord (Germany), with successful acquisition of 215 in situ data points. The time series was in good agreement with DMn concentrations determined from discretely collected samples analysed via inductively coupled plasma mass spectrometry (ICP-MS), exhibiting a mean accuracy of 87% over the full deployment duration (with an accuracy of > 99% for certain periods) and clear correlations to key hydrographic parameters.Felix GeißlerEric P. AchterbergAlexander D. BeatonMark J. HopwoodMario EspositoMatt C. MowlemDouglas P. ConnellyDouglas WallaceNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Felix Geißler Eric P. Achterberg Alexander D. Beaton Mark J. Hopwood Mario Esposito Matt C. Mowlem Douglas P. Connelly Douglas Wallace Lab-on-chip analyser for the in situ determination of dissolved manganese in seawater
description	Abstract A spectrophotometric approach for quantification of dissolved manganese (DMn) with 1-(2-pyridylazo)-2-naphthol (PAN) has been adapted for in situ application in coastal and estuarine waters. The analyser uses a submersible microfluidic lab-on-chip device, with low power (~ 1.5 W) and reagent consumption (63 µL per sample). Laboratory characterization showed an absorption coefficient of 40,838 ± 1127 L⋅mol−1⋅cm−1 and a detection limit of 27 nM, determined for a 34.6 mm long optical detection cell. Laboratory tests showed that long-term stability of the PAN reagent was achieved by addition of 4% v/v of a non-ionic surfactant (Triton-X100). To suppress iron (Fe) interferences with the PAN reagent, the Fe(III) masking agents deferoxamine mesylate (DFO-B) or disodium 4,5-dihydroxy-1,3-benzenedisulfonate (Tiron) were added and their Fe masking efficiencies were investigated. The analyser was tested during a deployment over several weeks in Kiel Fjord (Germany), with successful acquisition of 215 in situ data points. The time series was in good agreement with DMn concentrations determined from discretely collected samples analysed via inductively coupled plasma mass spectrometry (ICP-MS), exhibiting a mean accuracy of 87% over the full deployment duration (with an accuracy of > 99% for certain periods) and clear correlations to key hydrographic parameters.
format	article
author	Felix Geißler Eric P. Achterberg Alexander D. Beaton Mark J. Hopwood Mario Esposito Matt C. Mowlem Douglas P. Connelly Douglas Wallace
author_facet	Felix Geißler Eric P. Achterberg Alexander D. Beaton Mark J. Hopwood Mario Esposito Matt C. Mowlem Douglas P. Connelly Douglas Wallace
author_sort	Felix Geißler
title	Lab-on-chip analyser for the in situ determination of dissolved manganese in seawater
title_short	Lab-on-chip analyser for the in situ determination of dissolved manganese in seawater
title_full	Lab-on-chip analyser for the in situ determination of dissolved manganese in seawater
title_fullStr	Lab-on-chip analyser for the in situ determination of dissolved manganese in seawater
title_full_unstemmed	Lab-on-chip analyser for the in situ determination of dissolved manganese in seawater
title_sort	lab-on-chip analyser for the in situ determination of dissolved manganese in seawater
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/774b2ff07d764865aacafdcfbf6ae7c2
work_keys_str_mv	AT felixgeißler labonchipanalyserfortheinsitudeterminationofdissolvedmanganeseinseawater AT ericpachterberg labonchipanalyserfortheinsitudeterminationofdissolvedmanganeseinseawater AT alexanderdbeaton labonchipanalyserfortheinsitudeterminationofdissolvedmanganeseinseawater AT markjhopwood labonchipanalyserfortheinsitudeterminationofdissolvedmanganeseinseawater AT marioesposito labonchipanalyserfortheinsitudeterminationofdissolvedmanganeseinseawater AT mattcmowlem labonchipanalyserfortheinsitudeterminationofdissolvedmanganeseinseawater AT douglaspconnelly labonchipanalyserfortheinsitudeterminationofdissolvedmanganeseinseawater AT douglaswallace labonchipanalyserfortheinsitudeterminationofdissolvedmanganeseinseawater
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Lab-on-chip analyser for the in situ determination of dissolved manganese in seawater

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