FLUOROMETRIC-DETERMINATION OF MERCURY WITH A WATER-SOLUBLE PORPHYRIN AND PORPHYRIN-DOPED SOL-GEL FILMS

被引:116
作者
PLASCHKE, M [1 ]
CZOLK, R [1 ]
ACHE, HJ [1 ]
机构
[1] FORSCHUNGSZENTRUM KARL GMBH,INST RADIOCHEM,D-76021 KARLSRUHE,GERMANY
关键词
FLUOROMETRY; MERCURY; PORPHYRINS; SOL-GEL FILMS;
D O I
10.1016/0003-2670(94)00568-7
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The fluorimetric determination of mercury ions with 5,10,15,20-tetra(p-sulfonatophenyl)porphyrin in aqueous solutions in aqueous solutions and in porphyrin doped sol-gel films was investigated. Optimization of complexation conditions such as buffer components, pH range and temperature resulted in a method which enabled the determination of mercury ions in aqueous solutions within 15 min with a detection limit of 1.4 mu g/l Hg(II). The main interfering ions were found to be Cd, Zn and Pb. To develop an optochemical sensing device the porphyrin derivative was immobilized in sol-gel thin films (thickness of about 600 nm) and the sensor properties (i.e., reactivity, stability and morphology of the sensitive layers) were studied. The kind of catalyst used (acid or base) was found to influence the stability and sensitivity. Sensing films prepared with acid were stable and insensitive to mercury. Preparation of the films with alkaline catalysis resulted in mercury sensitive layers with a limited stability. Stability could be improved by covalent binding of the reagent dye.
引用
收藏
页码:107 / 113
页数:7
相关论文
共 16 条
  • [1] [Anonymous], 1990, DRYING SOL GEL SCI, DOI [10.1016/B978-0-08-057103-4.50013-1, DOI 10.1016/B978-0-08-057103-4.50013-1]
  • [2] CHENG KL, 1982, HDB ORGANIC ANAL REA
  • [3] AN OPTICAL SENSOR FOR THE DETECTION OF HEAVY-METAL IONS
    CZOLK, R
    REICHERT, J
    ACHE, HJ
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 1992, 7 (1-3) : 540 - 543
  • [4] CZOLK R, 1990, THESIS U KARLSRUHE, P61
  • [5] FISCHER RA, 1963, STATISTICAL TABLES B, P46
  • [6] KAISER H, 1965, Z ANAL CHEM FRESENIU, V209, P1
  • [7] LEAD-SELECTIVE BULK OPTODES BASED ON NEUTRAL IONOPHORES WITH SUBNANOMOLAR DETECTION LIMITS
    LERCHI, M
    BAKKER, E
    RUSTERHOLZ, B
    SIMON, W
    [J]. ANALYTICAL CHEMISTRY, 1992, 64 (14) : 1534 - 1540
  • [8] AN OPTOCHEMICAL SENSOR FOR CD(II) AND HG(II) BASED ON A PORPHYRIN IMMOBILIZED ON NAFION(R) MEMBRANES
    MORALESBAHNIK, A
    CZOLK, R
    REICHERT, J
    ACHE, HJ
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 1993, 13 (1-3) : 424 - 426
  • [9] FLUORESCENCE OPTICAL SENSORS FOR CONTINUOUS DETERMINATION OF NEAR-NEUTRAL PH VALUES
    OFFENBACHER, H
    WOLFBEIS, OS
    FURLINGER, E
    [J]. SENSORS AND ACTUATORS, 1986, 9 (01): : 73 - 84
  • [10] IMMOBILIZED MORIN AS FLUORESCENCE SENSOR FOR DETERMINATION OF ALUMINUM(III)
    SAARI, LA
    SEITZ, WR
    [J]. ANALYTICAL CHEMISTRY, 1983, 55 (04) : 667 - 670