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首页> 外文期刊>Electroanalysis >Electrooxidation and electroreduction of undiluted acetonitrile at platinum microelectrodes. In situ determination of water in acetonitrile
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Electrooxidation and electroreduction of undiluted acetonitrile at platinum microelectrodes. In situ determination of water in acetonitrile

机译：铂微电极上未稀释乙腈的电氧化和电还原。乙腈中水的原位测定

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摘要

Well-defined and reproducible reduction waves of undiluted acetonitrile have been obtained at Pt microelectrodes in the presence of a minimum of 5 x 10(-3) M tetraalkilammonium perchlorates (TAAP). At smaller TAAP concentrations, traces of alkali metal ions interfered and the wave plateau could not be obtained. Neither was it possible to obtain a total oxidation wave of acetonitrile in the presence of a small concentration of LiClO4, in this case due to the oxidation of the ClO4- counterions. An addition of water to acetonitrile led to the formation of a new cathodic wave, the height of which was proportional to concentration of water up to 0.022 mol/L. The detection limit of determination of water in pure acetonitrile was estimated as 0.0090 mol/L. [References: 22]
机译：在至少5 x 10（-3）M高氯酸四烷基铵盐（TAAP）的存在下，在Pt微电极上获得了清晰明确且可再现的未稀释乙腈还原波。在较小的TAAP浓度下，痕量的碱金属离子会受到干扰，无法获得波平台。在这种情况下，由于ClO4-抗衡离子的氧化，在低浓度的LiClO4存在下，也无法获得乙腈的总氧化波。向乙腈中添加水导致形成新的阴极波，其高度与高达0.022 mol / L的水的浓度成比例。估计纯乙腈中水的检测极限为0.0090 mol / L。 [参考：22]

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