title: Seed-mediated grown silver nanoparticles as a colorimetric sensor for detection of ascorbic acid.
abstract: A simple and sensitive approach was demonstrated for detection of ascorbic acid (AA) based on seed-mediated growth of silver nanoparticles (Ag NPs). According to the seeding strategy, silver ions existing in the growth solution were reduced to silver atoms on the surface of silver seeds via redox reaction between silver ions and AA. This process -led to appear an absorption band in near 420nm owing to the localized surface plasmon resonance peak of the generated Ag NPs. This change in absorption spectra of Ag NPs caused a change in color of the mixture from colorless to yellow. It was found that the changes in absorption intensity at 420nm have a good relationship with the concentration of AA. Also, detection of AA was achieved through the established colorimetric sensor in the range of 0.25-25μM with detection limit of 0.054μM. Moreover, the selectivity of the method was evaluated with considering potential interferences. The method showed high selectivity toward AA rather than potential interferences and coexisted molecules with AA. It was successfully applied for detection and determination of AA in pharmaceutical tablets and commercial lemonade.
authors.affiliation: Department of Chemistry, Faculty of Science, K. N. Toosi University of Technology, Tehran, Iran.
authors.forename: Simindokht
authors.initials: S
authors.lastname: Rostami
authors.affiliation: Department of Marine Living Science, Ocean Sciences Research Center, Iranian National Institute for Oceanography and Atmospheric Science, Tehran, Iran. Electronic address: mehdinia@inio.ac.ir.
authors.forename: Ali
authors.initials: A
authors.lastname: Mehdinia
authors.affiliation: Department of Chemistry, Faculty of Science, K. N. Toosi University of Technology, Tehran, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Jabbari
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis*; D001628:Beverages / Q000032:analysis; D003124:Colorimetry / Q000379:methods*; D057230:Limit of Detection; D016014:Linear Models; D053768:Metal Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D015203:Reproducibility of Results; D012834:Silver / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013607:Tablets
chemical_list: D013607:Tablets; D012834:Silver; D001205:Ascorbic Acid
keywords: Ascorbic acid; Colorimetric sensor; Localized surface plasmon resonance; Seed-mediated growth strategy; Silver nanoparticle