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首页> 外文期刊>Electroanalysis >The 4-(Dimethylamino) benzaldehyde-4-ethylthiosemicarbazone as Ionophore for Mercury(II) Solid State Selective Electrode
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The 4-(Dimethylamino) benzaldehyde-4-ethylthiosemicarbazone as Ionophore for Mercury(II) Solid State Selective Electrode

机译：4-（二甲基氨基）苯甲醛-4-乙基硫代半碳酮作为离子载体用于汞（II）固态选择电极

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Hg(II) has formed a soluble complex with 4-(dimethylamino) benzaldehyde-4-ethylthiosemicarbazone (DMABET) in methanol with a molar ratio of mercury(II):DMABET of 1:4. The formation constant (K _f) and Gibbs free energy ({up triangle, open}G) of the complex showed that the formation of the complex was favorable. The DMABET was investigated as ionophore for Hg(II)-ion selective electrode (ISE). At optimum pH1-5 the proposed Hg(II)-ISE showed an almost Nernstian slope at 27.8±1mV, with linear regression coefficient, R ~2=0.995 and a detection limit of 5×10 ~(-6)M. There was no serious interference from silver(I) with selectivity coefficient 5.69×10 ~(-3). The electrode life span was more than 3months. It has been applied for real water sample analysis and the results were in good agreement with the standard method.
机译：Hg（II）与4-（二甲氨基）苯甲醛-4-乙基硫代半碳氮（（DMABET）在甲醇中形成可溶性配合物，汞（II）：DMABET的摩尔比为1：4。配合物的形成常数（K_f）和吉布斯自由能（{G，开放} G）表明配合物的形成是有利的。研究了DMABET作为Hg（II）离子选择性电极（ISE）的离子载体。在最佳pH1-5时，拟议的Hg（II）-ISE在27.8±1mV处显示出几乎能斯登的斜率，线性回归系数R〜2 = 0.995，检出限为5×10〜（-6）M。选择性系数为5.69×10〜（-3）的银（I）不受严重干扰。电极寿命超过3个月。该方法已用于实际水样分析，结果与标准方法吻合良好。

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