부산대학교 도서관

Luminescent particles of Anionic Polymeric Acryclic Acid Lead (Pb(PAA) 2 ) which containing eosine(HFInBr 4 ), Eosine nanomicroball of anionic polypropylene acid lead contained luminophores (short for E.N.PAA.L.C.L), were synthesized by a sol‐gel method, using anionic polymeric acryclic acid sodium (PAANa) as the precursor and Pb 2+ as the precipitant. NH 4 Ac‐HAc can react with the Pb 2+ in E.N.PAA.L.C.L, causing it to decompose into aqueous soluble components. E.N.PAA.L.C.L‐ NH 4 Ac‐HAc can emit strong and stable solid substrate room temperature phosphorescence (SS‐RTP) on filter paper, and bismuth, mercury or iodine can cause a decrease in phosphorescence intensity. Based on the facts above, a new method for the determination of trace bismuth by an SS‐RTP quenching method was established. The linear range of this method was 0.01–0.20(pg spot -1 ) (4.0×10 -12 g ml -1 ) of Bi 3+ , with a detection limit (LD) of 0.0016 pg spot -1 , and the regression equation of the working curve was ΔIp=61.01+237.8 m Bi3+ (pg spot -1 ), r=0.9992. This method was applied to the determination of trace bismuth in human hair and well water samples with satisfactory results. The mechanism of SS‐RTP emission was also discussed. [ABSTRACT FROM AUTHOR]