New Chemically Modified Screen-Printed Electrode for Co(II) Determination in Different Water Samples

被引:0
|
作者
Ali, Tamer Awad [1 ]
Aglan, Refat F. [2 ]
Mohamed, Gehad G. [3 ]
Mourad, Mai A. [3 ]
机构
[1] EPRI, Cairo 11727, Egypt
[2] Atom Energy Author, Hot Labs Ctr, Cairo 13759, Egypt
[3] Cairo Univ, Fac Sci, Dept Chem, Giza 12613, Egypt
来源
关键词
Screen-printed ion-selective electrode; magnesium alumino-silicate; cobalt determination; water samples; ION-SELECTIVE ELECTRODES; POTENTIOMETRIC DETERMINATION; COBALT DETERMINATION; SPECTROPHOTOMETRIC METHOD; PRECONCENTRATION; EXTRACTION; CONSTRUCTION; TITRATION; BROMIDE; SOIL;
D O I
暂无
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Modified screen-printed electrode (SPE) with magnesium alumino-silicate ionophore was fabricated for the determination of Co(II). The modified electrode reveals linear response over wide concentration range of 3.1x10(-7) - 1x10(-1) mol L-1 of Co(II) at 25 degrees C with a divalent cationic slope of 30.33 +/- 0.75 mV decade(-1) and exhibit detection limit of 3.1x10(-7) mol L-1. Moreover, the selectivity coefficient was measured by matched potential and fixed interference methods. The modified SPE sensor shows high selectivity and sensitivity for determination of Co(II) and also shows stable and reproducible response over a period of four months. This method can be used for determination of Co(II) in water, soil and fish tissue samples and the results obtained agreed with those obtained with atomic absorption spectrometer (AAS). The proposed potentiometric method was validated according to the IUPAC recommendation.
引用
收藏
页码:1812 / 1826
页数:15
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