Detection of relative [Na+] and [K+] levels in sweat with optical measurements

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dc.authoridKaya, Tolga/0000-0003-3425-4298
dc.authoridSEL, Kivanc/0000-0002-4623-5206
dc.contributor.authorAl-Omari, Mahmoud
dc.contributor.authorSel, Kivanc
dc.contributor.authorMueller, Anja
dc.contributor.authorEdwards, Jeffery
dc.contributor.authorKaya, Tolga
dc.date.accessioned2025-01-27T20:41:26Z
dc.date.available2025-01-27T20:41:26Z
dc.date.issued2014
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractWe describe the use of 2-hydroxy-1,4-naphthoquinone (HNQ, Lawsone) as a potential sweat electrolyte measurement marker. We use ultraviolet-visible absorbance measurements to determine the absorbance energy in a particular wavelength range (400 nm-500 nm). This novel approach allows us to eliminate the importance of the exact wavelength of the absorbance peak but find the integral of the range of interest. Although we numerically calculate the absorbance energy, it is imperative to use photodiodes to measure the intensity of the transmitted light that is fabricated particularly for the range of interest for future device implementations. We explored various mixing ratios of water and acetone to find the optimum solvent that would give the most sensitive and accurate relative electrolyte sensing. The pH value was also modified to see the effect on the absorbance energy and intensity. A representative group of subjects were used to collect sweat from the dehydration and hyperhydration cases. The results are convincing that HNQ solutions can be used as a wearable, continuous sweat sensor. (C) 2014 AIP Publishing LLC.
dc.description.sponsorshipScience of Advanced Materials program at Central Michigan University
dc.description.sponsorshipWe thank Donal Murray on the help for sweat collection. Partial funding was provided by the Science of Advanced Materials program at Central Michigan University. We also thank our subjects, who volunteered for the sweat collection.
dc.identifier.doi10.1063/1.4880295
dc.identifier.issn0021-8979
dc.identifier.issn1089-7550
dc.identifier.issue20
dc.identifier.scopus2-s2.0-84901981281
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1063/1.4880295
dc.identifier.urihttps://hdl.handle.net/20.500.12428/24141
dc.identifier.volume115
dc.identifier.wosWOS:000337143500007
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAmer Inst Physics
dc.relation.ispartofJournal of Applied Physics
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectLawsone
dc.subjectSodium
dc.subjectHydration
dc.subjectSensor
dc.titleDetection of relative [Na+] and [K+] levels in sweat with optical measurements
dc.typeArticle

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