title: Application of functional group modified substrate in room temperature phosphorescence, II--heavy atom-chelated filter paper for selective determination of alpha-naphthalene acetic acid.
abstract: Heavy atom-chelated filter paper was synthesized and used as the substrate for room-temperature phosphorescence (RTP). The synthesis conditions for chelated paper were studied. The Pb-chelated filter paper could selectively induce the RTP of alpha-naphthalene acetic acid (alpha-NAA). The excitation and emission wavelengths of RTP of alpha-NAA were 300 nm and 521 nm, respectively. The concentration of alpha-NAA was linear with the RTP intensity in the range 2 x 10(-6)-6 x 10(-4) mol/L (correlation coefficient, 0.9999). The concentration detection limit was 1.35 x 10(-7) mol/L and the absolute detection limit was 0.25 ng/spot. The RSD (n = 10) was 1.7%. The method was applied to the analysis of water and vegetable samples with satisfactory results. Because the heavy atom was directly chelated onto the filter paper, the heavy-atom effect on the RTP of NAA was further increased and the analysis procedure was simple, fast and economical.
authors.affiliation: Department of Chemistry, Capital Normal University, Beijing 100037, People's Republic of China. zhurh@mail.cnu.edu.cn
authors.forename: Ruohua
authors.initials: R
authors.lastname: Zhu
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Wang
authors.forename: Pei Long
authors.initials: PL
authors.lastname: Wang
mesh_terms: D001224:Aspartic Acid / Q000031:analogs & derivatives; D002614:Chelating Agents / Q000737:chemistry*; D005374:Filtration; D005504:Food Analysis; D006863:Hydrogen-Ion Concentration; D008163:Luminescent Measurements; D008851:Micropore Filters; D008855:Microscopy, Electron, Scanning; D009280:Naphthaleneacetic Acids / Q000032:analysis* / Q000737:chemistry*; D010209:Paper; D013379:Substrate Specificity; D013696:Temperature; D014675:Vegetables / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D002614:Chelating Agents; D009280:Naphthaleneacetic Acids; D014867:Water; D001224:Aspartic Acid; C034182:1-naphthaleneacetic acid; C031948:iminoaspartic acid