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This one\u2010pot down\u2010top strategy causes to high\u2010yield controllable synthesis method. The reaction time and probe concentration were optimized. Then, the fluorescence intensity of aqueous samples containing different Ractopamine concentrations and 500\u2009ppm DPA\u2010GQDs were measured at 25\u00b0C with an excitation wavelength of 274\u2009nm. The sensing platform was also applied to detect Ractopamine in untreated plasma samples. The fluorescence spectroscopy technique responses indicated a linear relationship between the peak fluorescence intensity and ractopamine concentration in the range of 0.25\u201015\u2009ppm with low limit of quantification of 0.25\u2009ppm was for aqueous and plasma samples, respectively.<\/jats:p>","DOI":"10.1002\/jmr.2903","type":"journal-article","created":{"date-parts":[[2021,5,10]],"date-time":"2021-05-10T14:35:14Z","timestamp":1620657314000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Sensitive recognition of ractopamine using <scp>GQDs\u2010DPA<\/scp> as organic fluorescent probe"],"prefix":"10.1002","volume":"34","author":[{"given":"Kosar","family":"Sadinejad","sequence":"first","affiliation":[{"name":"Pharmaceutical Analysis Research Center Tabriz University of Medical Sciences  Tabriz 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