title: Investigation on the co-luminescence effect of europium (III)-lanthanum(III)-dopamine-sodium dodecylbenzene sulfonate system and its application.
abstract: A novel luminescence, enhancement phenomenon in the europium(III)-dopamine-sodium dodecylbenzene sulfonate system was observed when lanthanum(III) was added. Based on this, a sensitive co-luminescence method was established for the determination of dopamine. The luminescence signal for the europium (III)-lanthanum(III)-dopamine-sodium dodecylbenzene sulfonate system was monitored at λ(ex) = 300 nm, λ(em) = 618 nm and pH 8.3. Under optimized conditions, the enhanced luminescence signal responded linearly to the concentration of dopamine in the range 1.0 × 10(-10)-5.0 × 10(-7) mol/L with a correlation coefficient of 0.9993 (n = 11). The detection limit (3σ) was 2.7 × 10(-11) mol/L and the relative standard deviation for 11 parallel measurements of 3.0 × 10(-8) mol/L dopamine was 1.9%. The presented method was successfully applied for the estimation of dopamine in samples of pharmaceutical preparations, human serum and urine. The possible luminescence enhancement mechanism of the system is discussed briefly.
authors: School of Chemistry and Chemical Engineering, Shihezi University, Xinjiang Bintuan Key lab of Chemical Engineering for Green Process, Shihezi, Xinjiang 832003, People's Republic of China.
authors: Hailin
authors: H
authors: Si
authors: Fang
authors: F
authors: Zhao
authors: Huan
authors: H
authors: Cai
mesh_terms: D001557:Benzenesulfonates / Q000737:chemistry*; D004298:Dopamine / Q000032:analysis*; D005063:Europium / Q000737:chemistry*; D006801:Humans; D007811:Lanthanum / Q000737:chemistry*; D049449:Luminescence; D008163:Luminescent Measurements; D004364:Pharmaceutical Preparations / Q000737:chemistry
chemical_list: D001557:Benzenesulfonates; D004364:Pharmaceutical Preparations; D005063:Europium; C001114:dodecylbenzenesulfonic acid; D007811:Lanthanum; D004298:Dopamine
keywords: co-luminescence; dopamine; europium; lanthanum