在pH =9.0的弱碱性环境中,Hg2+与邻菲啰啉(phen)反应形成无色螯合物[Hg (phen)3]2+,再与刚果红(CR)反应,形成三元离子缔合物Hg(phen)3CR,其摩尔比为1∶1.此时引起共振瑞利散射(RRS)、二级散射(SOS)和倍频散射(FDS)光谱显著增强,最大的散射波长分别位于578 nm(RRS法)、612 nm(SOS法)和352 nm(FDS法).在一定条件下,散射增强(△I)与Hg2+浓度呈良好的线性关系,检出限分别为2.32 μg/L(RRS法)、3.20 μg/L(SOS法)和1.56 μg/L(FDS法),考察了最佳实验条件和影响因素,表明本方法具有良好的选择性,并以RRS法为例研究了共存物质的影响.据此建立了灵敏度高、选择性好、快速准确测定Hg2+的光散射新方法,该方法用于环境水样中Hg2+的测定取得满意结果.并对RRS增强的原因和反应机理进行了讨论.
参考文献
| [1] | Zhang L,Wong M H.Environmental Mercury Contamination in China:Sources and Impacts[J].Environ Int,2007,33(1):108-121. |
| [2] | Kerstin Leopold,Michael Foulkes,Paul Worsfold.Methods for the Determination and Speciation of Mercury in Natural Waters-A Review[J].Anal Chim Acta,2010,663:127-138. |
| [3] | WANG Yingying,TAN Kejun,YUAN Rui.Determination of Hg2 + by Resonance Light Scattering Technique Based on the Interaction with HTPB[J].Acta Chim Sin[J].2012,70(5):643-648(in Chinese).王莹莹,谭克俊,袁睿.基于与HTPB相互作用共振光散射法测定汞[J].化学学报,2012,70(5):643-648. |
| [4] | LI Yongmei,LI Renyu,ZHANG Long,et al.Fading Spectrophotometric Determination of Trace Mercury with Hg2 +-iodideacridine Orange-polyvinyl Alcohol Association System[J].Metall Anal,2010,30 (5):61-64 (in Chinese).李咏梅,李人宇,张龙,等.Hg2+-碘化物-吖啶橙-聚乙烯醇缔合物体系褪色光度法测定痕量汞[J].冶金分析,2010,30(5):61-64. |
| [5] | Segade S R,Tyson J F.Determination of Methylmercury and Inorganic Mercury in Water Samples by Slurry Sampling Cold Vapor Atomic Absorption Spectrometry in a Flow Injection System after Preconcentration on Silica C18 Modified[J].Talanta,2007,71 (4):1696-1702. |
| [6] | Leopold K,Harwardt L,Schuster M,et al.A New Fully Automated On-line Digestion System for Ultra Trace Analysis of Mercury in Natural Waters by Means of FI-CV-AFS[J].Talanta,2008,76(2):382-388. |
| [7] | WANG Meng,ZHANG Yu,FENG Weiyue,et al.Determination of Mercury in Fish by Isotope Dilution Inductively Coupled Plasma-Mass Spectrometry[J]Chinese J Anal Chem,2007,35(7):945-948(in Chinese).王萌,张瑜,丰伟悦,等.同位素稀释电感耦合等离子体质谱法测定鱼样中的总汞[J].分析化学,2007,35(7):945-948. |
| [8] | LIU Shaopu,LIU Zhongfang.Spectra of Resonant Luminescence and Double Scattering of Mercury (Ⅱ)-ThiocyanateVictoria Blue 4R System and Their Analytical Application[J].Chem J Chinese Univ,1996,17:887-892 (in Chinese).刘绍璞,刘忠芳.汞(Ⅱ)-硫氰酸盐-维多利亚蓝4R体系的共振发光和二级散射光谱及其分析应用[J].高等学校化学学报,1996,17:887-892. |
| [9] | LIU Qin,LIU Shaopu.Resonance Rayleigh Scattering of Hg (Ⅱ)-1,10-Phenanthroline-Halogenated Fluorescin Systems and Their Analytical Annlication[J].J Yunnan Univ(Nat Sci),1999,21:58-60(in Chinese).刘芹,刘绍璞.汞(Ⅱ)-1,10-菲咯啉-卤代荧光素染料体系的共振瑞利散射及其分析应用[J].云南大学学报(自然科学版),1999,21:58-60. |
| [10] | LIU Shaopu,LONG Xiufen.Recent Advances of Molecular Spectrometric Methods for the Determination of Nucleic Acids[J].Phys Test Chem Anal(Part B:Chem Anal),2002,38(2):101-107(in Chinese).刘绍璞,龙秀芬.某些分子光谱分析法测定核酸的进展[J].理化检测-化学分册,2002,38(2):101-107. |
| [11] | Liu S P,Hu X L,Li N B.Resonance Rayleigh Scattering Method for the Determination of Aminoglycoside Antibiotics with Trypanblue[J].Anal Lett,2003,36(13):2805-2821. |
| [12] | Jiang Z L,Feng Z W,Li T S,et al.Resonance Scattering Spectroscopy of Gold Nanoparticle[J].Sci China(Series B),2001,44(2):175-181. |
| [13] | CHEN Peili,LIU Shaopu,LIU Zhongfang,et al.Resonance Rayleigh Scattering,Second-order Scattering and Frequency Doubling Scattering Spectra of Ternary Mixed Ligand Complex of Hg (Ⅱ)-famotidine and Anionic Surfactant and Their Analytical Applications[J].Chem J Chinese Univ.2011.32(4):857-862(in Chinese).陈佩丽,刘绍璞,刘忠芳,等.Hg(Ⅱ)与法莫替丁和阴离子表面活性剂三元混配物的共振瑞利散射、二级散射和倍频散射光谱及其分析应用[J].高等学校化学学报,2011,32(4):857-862. |
| [14] | JIANG Zhiliang,LI Fang,LIANG Hong.Resonance Scatterring Spectroscopic Study of System of PMo12 Heteropoly Acid and Rhodamin S[J].Acta Chim Sin,2000,58 (8):1059-1062 (in Chinese).蒋治良,李芳,梁宏.磷钼杂多酸-罗丹明S体系的共振散射光谱研究[J].化学学报,2000,58(8):1059-1062. |
| [15] | WANG Fen,LIU Zhongfang,LIU Shaopu.Study on the Interaction Between Three Anthracycline Anticancer Drugs and Congo Red by Absorption,Fluorescence and Resonance Rayleigh Scattering Spectra[J].Acta Chim Sin,2005,63 (21):1991-1998(in Chinese).王芬,刘忠芳,刘绍璞.某些蒽环类抗癌药物与刚果红相互作用的吸收、荧光和共振瑞利散射光谱研究[J].化学学报,2005,63(21):1991-1998. |
| [16] | CUI Fengling,QIN Lixia,LI Fang,et al.Resonance Light Scattering Spectrum of Methylt Tiphenylphosphonium Bromidepotassium Iodide-mercury System and Its Application[J].Metall Anal,2009,29 (3):41-44 (in Chinese).崔凤灵,秦利霞,李芳,等.甲基三苯基溴化磷-碘化钾-汞体系的共振光散射光谱及其应用[J].冶金分析,2009,29(3):41-44. |
| [17] | WANG Jian,LIU Zhongfang,LIU Shaopu,et al.Study on Fluoroquinolone Antibiotics-Cobalt (Ⅱ)-Congo Red Systems by Resonance Rayleigh Scattering Spectra and Their Analytical Applications[J].Acta Chim Sin,2008,66 (11):1337-1343 (in Chinese).王剑,刘忠芳,刘绍璞,等.氟喹诺酮类抗生素与钴(Ⅱ)和刚果红三元配合物的共振瑞利散射光谱研究及其分析应用[J].化学学报,2008,66(11):1337-1343. |
| [18] | Stanton S G,Pecora R,Hudson B S.Resonance Enhanced Dynamic Rayleigh Scattering[J].Phys Chem,1979,75:5615-5626. |
| [19] | Liu S P,Jiang Z L,Kong L,et al.Absorption and Rayleigh Scattering and Resonance Rayleigh Scattering Spectra of[HgX2]π Nanopartieles[J].Sci China(Series B),2002,32(6):554-560. |
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