A Blue-Light Attenuation Optical Analyzer Based on Dual Solar Cells for Copper(II) Quantification in Metallic Alloys

A Blue-Light Attenuation Optical Analyzer Based on Dual Solar Cells for Copper(II) Quantification in Metallic Alloys | 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 A Blue-Light Attenuation Optical Analyzer Based on Dual Solar Cells for Copper(II) Quantification in Metallic Alloys Ghufran K. Allawi, N. S Turkey This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8752400/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 30 Apr, 2026 Read the published version in Sensing and Imaging → Version 1 posted 12 You are reading this latest preprint version Abstract This study presents a novel spectrophotometric continuous flow injection analysis (CFIA) system for the quantification of copper(II) ions (Cu²⁺) via the Cu 2+ –thiocyanate (Cu(SCN) 2 ) precipitate. A homemade photometric instrument was designed and constructed to serve as the detection unit. The analytical cell was engineered in a brass incubator that contained a central flow tube positioned longitudinally through the incubator. Two orthogonal arrays of eight apertures were machined: the 0–180° and 0–90° axes aligned to the flow tube to contain the accommodated high-intensity blue LEDs arranged to surround the flow cell at each side with a twin solar cell photonic detector. This configuration guaranteed accurate optical alignment between radiation sources and the detector. The Cu(SCN) 2 precipitate was analyzed for its scattering and absorbance properties. A strict optimization of chemical and physical parameters was conducted to maximize signal intensity and reproducibility. Calibration graph demonstrated excellent linearity in the range 0.05–15 mmol/L, with a correlation coefficient (r) of 0.9987 and a limit of detection (LOD) of 12.5 µmol/L, superior to conventional turbidity (LOD ≈ 250 µmol/L). Application to certified alloys confirmed accuracy, with paired t-tests and individual t-tests showing no significant difference (t-tab > t-cal) between the proposed and reference methods Flow injection analysis (FIA) Turbidimetric detection Copper(II) determination Homemade photometric device Blue LED solar cell detector Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 30 Apr, 2026 Read the published version in Sensing and Imaging → Version 1 posted Editorial decision: Revision requested 21 Mar, 2026 Reviews received at journal 21 Mar, 2026 Reviews received at journal 17 Mar, 2026 Reviewers agreed at journal 15 Mar, 2026 Reviewers agreed at journal 14 Mar, 2026 Reviews received at journal 03 Mar, 2026 Reviewers agreed at journal 09 Feb, 2026 Reviewers agreed at journal 05 Feb, 2026 Reviewers invited by journal 04 Feb, 2026 Editor assigned by journal 03 Feb, 2026 Submission checks completed at journal 02 Feb, 2026 First submitted to journal 31 Jan, 2026 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-8752400","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":586356327,"identity":"20523038-32eb-4849-bd0c-0f2d5268b2db","order_by":0,"name":"Ghufran K. 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A homemade photometric instrument was designed and constructed to serve as the detection unit. The analytical cell was engineered in a brass incubator that contained a central flow tube positioned longitudinally through the incubator. Two orthogonal arrays of eight apertures were machined: the 0\u0026ndash;180\u0026deg; and 0\u0026ndash;90\u0026deg; axes aligned to the flow tube to contain the accommodated high-intensity blue LEDs arranged to surround the flow cell at each side with a twin solar cell photonic detector. This configuration guaranteed accurate optical alignment between radiation sources and the detector. The Cu(SCN)\u003csub\u003e2\u003c/sub\u003e precipitate was analyzed for its scattering and absorbance properties. A strict optimization of chemical and physical parameters was conducted to maximize signal intensity and reproducibility. 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