Alternating Current Method for the Measurement of Electrical Conductivity and Determination of Concentrations in Aqueous Solutions

Alternating Current Method for the Measurement of Electrical Conductivity and Determination of Concentrations in Aqueous Solutions | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Alternating Current Method for the Measurement of Electrical Conductivity and Determination of Concentrations in Aqueous Solutions Mihai Petrov This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8807964/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract A nondestructive alternating-current conductometric method for determination of molar concentrations in aqueous solutions is presented. Complete current–voltage characteristics at 50 Hz were recorded and their S-shaped form was analyzed. Four regions corresponding to ohmic conduction, double-layer charging, Faradaic processes, and diffusion limitation were identified. The initial linear segment provided bulk resistance and conductance, while the capacitive region enabled evaluation of double-layer capacitance. Using the Gouy–Chapman–Stern model, Debye layer thickness was calculated and correlated with electrolyte concentration. Calibration with KCl standards (0.001–1 mol L⁻¹) and application to distilled and drinking water showed agreement with classical conductivity within 5%. The procedure requires simple instrumentation, avoids electrolysis typical for DC methods, and yields information on both bulk and interfacial properties. AC conductometry Debye layer aqueous electrolytes impedance concentration determination electrical double layer Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8807964","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":588264575,"identity":"875c601e-f972-428c-9e61-9e0e1d982ef9","order_by":0,"name":"Mihai Petrov","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAv0lEQVRIiWNgGAWjYDACZh4og72BDUgeIFZLAhDzHCBWCwNMi0QCkVp023mPPfj4456cwc3Hzx7zMNyxayCkxewwX7rhjIRiY4PbaebGPAzPkonQwmMmzZOQkDhzdoKZ5AyGw8kEHQbW8gekZebxbyRoYQBq6ZfgMZP4wHDYjhgt5oY9aQnG/Dw55QYfDJ4lENZy/ozZgx82CXJs7Me3PUiouGNPUAsQsCGxDRgSG0jUwsBAlC2jYBSMglEwsgAAWek7OiQObNEAAAAASUVORK5CYII=","orcid":"","institution":"Burgas State University “Prof. Dr. Assen Zlatarov”","correspondingAuthor":true,"prefix":"","firstName":"Mihai","middleName":"","lastName":"Petrov","suffix":""}],"badges":[],"createdAt":"2026-02-06 14:08:19","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-8807964/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-8807964/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":104670278,"identity":"53561d61-aebc-42ca-bff2-a6e8582b800d","added_by":"auto","created_at":"2026-03-15 17:54:39","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":882698,"visible":true,"origin":"","legend":"","description":"","filename":"ManuscriptJSolutionChemistryMihaiPetrov.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8807964/v1_covered_e085c8f7-d7b4-4b97-bf09-f7e0f647e03b.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Alternating Current Method for the Measurement of Electrical Conductivity and Determination of Concentrations in Aqueous Solutions","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"AC conductometry, Debye layer, aqueous electrolytes, impedance, concentration determination, electrical double layer","lastPublishedDoi":"10.21203/rs.3.rs-8807964/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8807964/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eA nondestructive alternating-current conductometric method for determination of molar concentrations in aqueous solutions is presented. Complete current\u0026ndash;voltage characteristics at 50 Hz were recorded and their S-shaped form was analyzed. Four regions corresponding to ohmic conduction, double-layer charging, Faradaic processes, and diffusion limitation were identified. The initial linear segment provided bulk resistance and conductance, while the capacitive region enabled evaluation of double-layer capacitance. Using the Gouy\u0026ndash;Chapman\u0026ndash;Stern model, Debye layer thickness was calculated and correlated with electrolyte concentration. Calibration with KCl standards (0.001\u0026ndash;1 mol L⁻\u0026sup1;) and application to distilled and drinking water showed agreement with classical conductivity within 5%. 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