{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,18]],"date-time":"2026-01-18T12:16:16Z","timestamp":1768738576734,"version":"3.49.0"},"reference-count":37,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2019,1,11]],"date-time":"2019-01-11T00:00:00Z","timestamp":1547164800000},"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":["61661014, 61627807, 21767004"],"award-info":[{"award-number":["61661014, 61627807, 21767004"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Nature Science Foundation of Guangxi Province","award":["2015GXNSFBA139041"],"award-info":[{"award-number":["2015GXNSFBA139041"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Simple and facile electrochemical sensors for nitrite detection were fabricated by directly depositing ferrocenoyl cysteine conjugates Fc[CO-Cys(Trt)-OMe]2 [Fc(Cys)2] or Fc[CO-Glu-Cys-Gly-OH] [Fc-ECG] on screen-printed electrodes (SPEs). The modified carbon electrodes were characterized by scanning electron microscopy (SEM), cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Results indicated that Fc-ECG\/SPE sensor showed enhanced current response and a lower overpotential than Fc(Cys)2\/SPE sensor for nitrite detection. Optimal operating conditions were estimated for nitrite detection by DPV. The concentration of nitrite showed a good linear relationship with the current response in the range of 1.0\u201350 \u03bcmol\u00b7L\u22121 and with 0.3 \u03bcmol\u00b7L\u22121 as the concentration for limit of detection. There were no interferences from most common ions. The development of this electrochemical sensor was used for nitrite detection in pickled juice with a R.S.D. lower than 2.1% and average recovery lower than 101.5%, which indicated that disposable electrochemical sensor system can be applied for rapid and precise nitrite detection in foods.<\/jats:p>","DOI":"10.3390\/s19020268","type":"journal-article","created":{"date-parts":[[2019,1,11]],"date-time":"2019-01-11T11:36:42Z","timestamp":1547206602000},"page":"268","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["A Facile Electrochemical Sensor Labeled by Ferrocenoyl Cysteine Conjugate for the Detection of Nitrite in Pickle Juice"],"prefix":"10.3390","volume":"19","author":[{"given":"Xiao-Zhen","family":"Feng","sequence":"first","affiliation":[{"name":"Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China"},{"name":"School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, China"}]},{"given":"Annaleizle","family":"Ferranco","sequence":"additional","affiliation":[{"name":"Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada"}]},{"given":"Xiaorui","family":"Su","sequence":"additional","affiliation":[{"name":"School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, China"}]},{"given":"Zhencheng","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, China"}]},{"given":"Zhiliang","family":"Jiang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5943-8547","authenticated-orcid":false,"given":"Guo-Cheng","family":"Han","sequence":"additional","affiliation":[{"name":"School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, China"}]}],"member":"1968","published-online":{"date-parts":[[2019,1,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"753","DOI":"10.1016\/j.snb.2017.12.104","article-title":"Imprinted polymer coated impedimetric nitrate sensor for real-time water quality monitoring","volume":"259","author":"Alahi","year":"2018","journal-title":"Sens. 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