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Determination of iodates using silver solid amalgam electrodes

机译：使用银固体汞齐电极测定碘酸盐

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摘要

Use of the polished solid silver amalgam electrode (p-AgSAE) as such and of its modification by a mercury meniscus (m-AgSAE) for determination of iodates in aqueous solutions by differential pulse cathodic voltammetry is described. The former type of the mentioned electrode does not contain free mercury and is of a completely non-toxic form. The determination is based on reduction of iodates into iodides in 0.1 M NaOH at the peak potential about -1.3 V (vs. SCE). The detection limit (3 SD; N = 11) for p-AgSAE is 0.34 ppm iodine, RSD = 1.2% and for m-AgSAE 0.14 ppm iodine, RSD = 0.5% respectively. The range of possible working potentials of both types of AgSAE is presented, in comparison with the hanging mercury drop electrode. The described method of the determination of iodine in the form of iodates in commercial table salt was found to be simple and ready for common applications. [References: 33]
机译：描述了使用抛光的固态银汞齐电极（p-AgSAE）本身以及通过汞弯液面（m-AgSAE）进行修饰以通过差分脉冲阴极伏安法测定水溶液中的碘酸盐的用途。所述电极的前一种类型不含游离汞，并且是完全无毒的形式。该测定基于在约-1.3 V（相对于SCE）的峰值电势下，在0.1 M NaOH中将碘酸盐还原为碘化物。对-AgSAE的检出限（3 SD; N = 11）分别为0.34 ppm碘，RSD = 1.2％和m-AgSAE 0.14 ppm碘，RSD = 0.5％。与悬挂式汞滴电极相比，介绍了两种类型的AgSAE的可能工作电位范围。发现描述的测定市售食盐中碘酸盐形式碘的方法简便易行，可用于一般应用。 [参考：33]

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