Introducing "Insertive Stripping Voltammetry": Electrochemical Determination of Sodium Ions Using an Iron(III) Phosphate-Modified Electrode
A new type of stripping voltammetry is introduced, in which the preconcentration step includes ion insertion into a solid phase followed by a quantification step in which the ion is expelled via linear sweep voltammetry. Specifically, sodium-ion concentrations in both aqueous solution and synthetic...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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American Chemical Society
2020
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| _version_ | 1797100891003682816 |
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| author | Suherman, AL Lin, M Rasche, B Compton, RG |
| author_facet | Suherman, AL Lin, M Rasche, B Compton, RG |
| author_sort | Suherman, AL |
| collection | OXFORD |
| description | A new type of stripping voltammetry is introduced, in which the preconcentration step includes ion insertion into a solid phase followed by a quantification step in which the ion is expelled via linear sweep voltammetry. Specifically, sodium-ion concentrations in both aqueous solution and synthetic sweat are electrochemically determined using iron(III) phosphate-modified glassy carbon electrodes. The electrochemical method consists of a potentiostatic step, holding the potential of −0.5 V vs saturated calomel electrode (SCE) for 100 s, followed by linear sweep voltammetry. It is shown that a thermal and mechanical pretreatment at 800 °C and with a ball mill, respectively, improve the electrochemical response of the iron(III) phosphate toward Na+. The involved structural and morphological changes were assessed by thermogravimetric analysis, scanning electron microscopy, and powder X-ray diffraction. The sensor exhibits a good selectivity toward Li+ and K+ and shows a linear response between 0.025 and 0.2 M Na+. As a proof-of-principle, the sensor was used to determine the sodium level in synthetic sweat. |
| first_indexed | 2024-03-07T05:44:07Z |
| format | Journal article |
| id | oxford-uuid:e69b90e2-2076-45f9-bbb4-fdb5fe3479ca |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:44:07Z |
| publishDate | 2020 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:e69b90e2-2076-45f9-bbb4-fdb5fe3479ca2022-03-27T10:32:23ZIntroducing "Insertive Stripping Voltammetry": Electrochemical Determination of Sodium Ions Using an Iron(III) Phosphate-Modified ElectrodeJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:e69b90e2-2076-45f9-bbb4-fdb5fe3479caEnglishSymplectic ElementsAmerican Chemical Society2020Suherman, ALLin, MRasche, BCompton, RGA new type of stripping voltammetry is introduced, in which the preconcentration step includes ion insertion into a solid phase followed by a quantification step in which the ion is expelled via linear sweep voltammetry. Specifically, sodium-ion concentrations in both aqueous solution and synthetic sweat are electrochemically determined using iron(III) phosphate-modified glassy carbon electrodes. The electrochemical method consists of a potentiostatic step, holding the potential of −0.5 V vs saturated calomel electrode (SCE) for 100 s, followed by linear sweep voltammetry. It is shown that a thermal and mechanical pretreatment at 800 °C and with a ball mill, respectively, improve the electrochemical response of the iron(III) phosphate toward Na+. The involved structural and morphological changes were assessed by thermogravimetric analysis, scanning electron microscopy, and powder X-ray diffraction. The sensor exhibits a good selectivity toward Li+ and K+ and shows a linear response between 0.025 and 0.2 M Na+. As a proof-of-principle, the sensor was used to determine the sodium level in synthetic sweat. |
| spellingShingle | Suherman, AL Lin, M Rasche, B Compton, RG Introducing "Insertive Stripping Voltammetry": Electrochemical Determination of Sodium Ions Using an Iron(III) Phosphate-Modified Electrode |
| title | Introducing "Insertive Stripping Voltammetry": Electrochemical Determination of Sodium Ions Using an Iron(III) Phosphate-Modified Electrode |
| title_full | Introducing "Insertive Stripping Voltammetry": Electrochemical Determination of Sodium Ions Using an Iron(III) Phosphate-Modified Electrode |
| title_fullStr | Introducing "Insertive Stripping Voltammetry": Electrochemical Determination of Sodium Ions Using an Iron(III) Phosphate-Modified Electrode |
| title_full_unstemmed | Introducing "Insertive Stripping Voltammetry": Electrochemical Determination of Sodium Ions Using an Iron(III) Phosphate-Modified Electrode |
| title_short | Introducing "Insertive Stripping Voltammetry": Electrochemical Determination of Sodium Ions Using an Iron(III) Phosphate-Modified Electrode |
| title_sort | introducing insertive stripping voltammetry electrochemical determination of sodium ions using an iron iii phosphate modified electrode |
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