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Ox\u2010TMB had a visible absorption peak at 625\u2009nm and a fluorescence peak around 420\u2009nm. When gallic acid (GA) was added to the system, Ox\u2010TMB was reduced to TMB, which made the color of the system disappear and the fluorescence recover. The linear ranges for determination of iron(II) were 0.5\u201310\u00a0\u03bcM (fluorometric) and 0.5\u201320\u2009\u03bcM (colorimetric), and the detection limits were 0.25\u2009\u03bcM (fluorometric) and 0.28\u2009\u03bcM (colorimetric). The linear ranges for determination of GA were 0\u201380\u2009\u03bcM (fluorometric) and 0\u201360\u2009\u03bcM (colorimetric), and the detection limits were 0.31\u2009\u03bcM (fluorometric) and 0.8\u00a0\u03bcM (colorimetric). The results of anti\u2010interference experiments shew that this dual\u2010mode assay had very good selectivity for the determination of iron(II) and GA.<\/jats:p>","DOI":"10.1002\/bio.4247","type":"journal-article","created":{"date-parts":[[2022,4,13]],"date-time":"2022-04-13T16:30:12Z","timestamp":1649867412000},"page":"1167-1174","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["A dual\u2010mode optical assay for iron(II) and gallic acid based on Fenton reaction"],"prefix":"10.1002","volume":"38","author":[{"given":"Li","family":"Qi","sequence":"first","affiliation":[{"name":"College of Chemistry and Environmental Science Shangrao Normal University  Shangrao JiangXi Province P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao","family":"Ding","sequence":"additional","affiliation":[{"name":"College of Science Sichuan Agricultural University  Chengdu Sichuan P. R. 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