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Investigation on the co‐luminescence effect of europium (III)–lanthanum(III)–dopamine–sodium dodecylbenzene sulfonate system and its application
Author(s) -
Si Hailin,
Zhao Fang,
Cai Huan
Publication year - 2013
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2485
Subject(s) - dodecylbenzene , europium , luminescence , sulfonate , chemistry , sodium , lanthanum , dopamine , detection limit , inorganic chemistry , nuclear chemistry , analytical chemistry (journal) , chromatography , materials science , organic chemistry , optoelectronics , neuroscience , biology
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. Copyright © 2013 John Wiley & Sons, Ltd.