{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T14:28:47Z","timestamp":1777559327324,"version":"3.51.4"},"reference-count":52,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2019,12,12]],"date-time":"2019-12-12T00:00:00Z","timestamp":1576108800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["31772099, 31401573 and 21505071"],"award-info":[{"award-number":["31772099, 31401573 and 21505071"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002858","name":"China Postdoctoral Science Foundation","doi-asserted-by":"publisher","award":["2017T100446, 2016M592050"],"award-info":[{"award-number":["2017T100446, 2016M592050"]}],"id":[{"id":"10.13039\/501100002858","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003995","name":"Natural Science Foundation of Anhui Province","doi-asserted-by":"publisher","award":["1908085MC98"],"award-info":[{"award-number":["1908085MC98"]}],"id":[{"id":"10.13039\/501100003995","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100017668","name":"Key Research and Development Program of Anhui Province","doi-asserted-by":"publisher","award":["201904a06020030"],"award-info":[{"award-number":["201904a06020030"]}],"id":[{"id":"10.13039\/501100017668","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["JZ2018HGTB0245"],"award-info":[{"award-number":["JZ2018HGTB0245"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A selective and sensitive electrochemical sensor was developed for simultaneous detection of phytohormones indole-3-acetic acid (IAA) and salicylic acid (SA). The sensing interface was fabricated on a porous, three-dimensional networked graphene hydrogel (GH) modified glassy carbon electrode (GCE). The electrocatalytic behavior of IAA and SA on the surface of the modified electrode (GH\/GCE) was investigated by cyclic voltammetry and linear sweep voltammetry. Results show that the oxidation reactions of IAA and SA occur at different potentials, which enable their simultaneous detection at the sensing interface. Under optimal conditions, the GH\/GCE exhibited good selectivity and stability and its response, unaffected by various interferents, was linear in the range of 4 to 200 \u03bcM of IAA and SA. The limit of detection (S\/N = 3) achieved were 1.42 \u03bcM for IAA and 2.80 \u03bcM for SA. The sensor performance was validated by measuring for IAA and SA in real vegetable samples with satisfactory results.<\/jats:p>","DOI":"10.3390\/s19245483","type":"journal-article","created":{"date-parts":[[2019,12,12]],"date-time":"2019-12-12T11:06:41Z","timestamp":1576148801000},"page":"5483","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["Electro-Oxidation and Simultaneous Determination of Indole-3-Acetic Acid and Salicylic Acid on Graphene Hydrogel Modified Electrode"],"prefix":"10.3390","volume":"19","author":[{"given":"Xiaodong","family":"Cao","sequence":"first","affiliation":[{"name":"School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Xueting","family":"Zhu","sequence":"additional","affiliation":[{"name":"School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Shudong","family":"He","sequence":"additional","affiliation":[{"name":"School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Xuan","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7703-8697","authenticated-orcid":false,"given":"Yongkang","family":"Ye","sequence":"additional","affiliation":[{"name":"School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China"}]}],"member":"1968","published-online":{"date-parts":[[2019,12,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"442","DOI":"10.1016\/j.snb.2016.02.087","article-title":"Simultaneous determination of zeatin and systemin by coupling graphene oxide-protected aptamers with catalytic recycling of DNase i","volume":"230","author":"Su","year":"2016","journal-title":"Sens. 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