[Cyclodextrin induced-room temperature phosphorescence for the determination of quinoline without deoxidization].
A cyclodextrininduced-room temperature phosphorescence (CD-RTP) system for the determination of quinoline without deoxidization procedure was developed based on the external heavy atom effect of dibromopropane (DBP), the RTP maximum wavelengths lambda(ex)/lambda(em) = 273/496nm. The difference of heavy atom effect between dibromopropane DBP and dibromoethane (DBE) was examined and the apparent formation constants of the ternary inclusion complexes for quinoline/beta-CD/DBP and quinoline/beta-CD/DBE systems were determined. As compared with DBE, the heavy atom effect of DBP was higher and the RTP intensity was stronger. The RTP intensity was linear for quinoline/beta-CD/DBP systems with quinoline concentration in the ranges of 5.0 x 10(-7)-5.0 x 10(-5)mol/L and 5.0 x 10(-5)-5.0 x 10(-4)mol/L, respectively. The detection limit was 7.8 x 10(-8)mol/L. The determination precision was satisfactory.
Chen
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Dept. of Chem., Shaoguan University, 512005 Shaoguan.
Mou
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Li
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D002138:Calibration; D003505:Cyclodextrins / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008163:Luminescent Measurements; D011407:Propane / Q000031:analogs & derivatives / Q000737:chemistry; D011804:Quinolines / Q000032:analysis* / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors
D003505:Cyclodextrins; D011804:Quinolines; C010440:dibromopropane; C037219:quinoline; D011407:Propane