首页> 外文期刊>International Journal of Electrochemical Science >In situ-Mercury Film Electrode for Simultaneous Determination of Lead and Cadmium Using Nafion Coated New Coumarin Schiff Base as Chelating-Adsorbent
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In situ-Mercury Film Electrode for Simultaneous Determination of Lead and Cadmium Using Nafion Coated New Coumarin Schiff Base as Chelating-Adsorbent

机译:Nafion涂层新香豆素席夫碱作为螯合吸附剂同时测定铅和镉的原位汞膜电极

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Reaction of o-phenylenediamine and 8-formyl-7-hydroxycoumarin yield a new coumarin salen ligand,(CSB) which was isolated as orange air-stable solid and characterized by melting point,1 13 thermogravimetric analysis (TGA), mass spectra, infrared and NMR ( H, C) spectroscopy. New CSBwas dispersed in nafion and nafion-CSB composite was deposited on a glassy carbon electrode. Themodified electrode nafion-CSB/GCE allowed the formation in-situ of mercury film for detection of Pb(II) and Cd(II) by anodic stripping voltammetry (ASV) in buffer phosphate solution pH 3.0 and 4.0.-1 Optimal conditions were studied (mercury concentration: CHg 40.0 mg L ; CSB concentracin; CCSB;-1 20.0 mol L ; pH 3.0 and pH 4.0; EACC:-1.1 V and tACC: 80).The detection limit (3/b) for Pb (II) Cd (II) were of 0.15 g L for Pb(II) and Cd(II) at pH 3.0. Moreover, 0.071 and 0.080 g L for Pb(II)and Cd(II), respectively at pH 4.0, The method was validated using ICP multi-element standard-1 solution IX (Merck) containing As, Be, Cd, Cr(VI), Hg, Ni, Pb, Se and Tl 100 mg L . Finally, river,tap and mineral waters were analyzed.
机译:邻苯二胺与8-甲酰基-7-羟基香豆素的反应生成了一种新的香豆素salen配体(CSB),其被分离为橙色的空气稳定固体,并具有熔点,1 13热重分析(TGA),质谱,红外光谱等特征。和NMR(H,C)光谱。将新的CSB分散在nafion中,并将nafion-CSB复合材料沉积在玻璃碳电极上。修饰的电极nafion-CSB / GCE允许原位形成汞膜,用于在pH 3.0和4.0.1的磷酸盐缓冲液中通过阳极溶出伏安法(ASV)检测Pb(II)和Cd(II)。 (汞浓度:CHg 40.0 mg L; CSB浓缩蛋白; CCSB; -1 20.0 mol L; pH 3.0和pH 4.0; EACC:-1.1 V和tACC:80)铅(II)的检出限(3 / b) Cd(II)在pH 3.0下的Pb(II)和Cd(II)的含量为0.15 gL。此外,在pH 4.0时,Pb(II)和Cd(II)的含量分别为0.071和0.080 g L,该方法已使用含有As,Be,Cd,Cr(VI)的ICP多元素标准品1溶液IX(Merck)进行了验证。 ),Hg,Ni,Pb,Se和Tl 100 mg L.最后,对河流,自来水和矿泉水进行了分析。

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