Determination of trace bismuth by a solid substrate room temperature phosphorescence quenching method based on Anionic Polymeric Acryclic Acid Lead particles containing luminescent eosine molecules

摘要

Luminescent particles of Anionic Polymeric Acryclic Acid Lead (Pb(PAA)(2)) which containing eosine(HFInBr4), 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 Pb2+ as the precipitant. NH4Ac-HAc can react with the Pb2+ in E.N.PAA.L.C.L, causing it to decompose into aqueous soluble components. E.N.PAA.L.C.L-NH4Ac-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 x 10(-12) g ml(-1)) of Bi3+, with a detection limit (LD) of 0.0016 pg spot(-1), and the regression equation of the working curve was Delta Ip = 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.