Ultra‐sensitive Voltammetric Aluminum Determination on a Solid Bismuth Electrode for Water Filter Verification,Electroanalysis

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Ultra‐sensitive Voltammetric Aluminum Determination on a Solid Bismuth Electrode for Water Filter Verification
Electroanalysis ( IF 2.7 ) Pub Date : 2020-01-28 , DOI: 10.1002/elan.201900741
Justyna Kopeć ₁ , Szymon Wójcik ₁ , Małgorzata Jakubowska ₁

Affiliation

This work presents a new ultra‐sensitive method of Al(III) as Al‐cupferron complex voltammetric determination, in 0.04 M ammonium sulfate of pH=6.1 and 0.003 M cupferron by environmentally friendly and durable Bismuth Bulk Annular Band Electrode (BiABE). The optimal measuring parameters include: potential window from −700 to −1250 mV versus Ag|AgCl, preconcentration time and potential of 120 s, −700 mV, respectively. The electrode surface can be activated by fast in situ method: applying short conditioning by the potential of −1300 mV. The best obtained analytical parameters are: range of linearity 0.2–1.2 μg L⁻¹ with high sensitivity of 1.333 μA/μg L⁻¹, limit of detection 0.04 μg L⁻¹ and repeatability below 2.3 %. The described procedure was verified using various CRMs, i. e. surface waters, waste waters and tea leaves. Satisfactory recovery values were obtained in the interval 99.2–103.5 %. Developed DPV procedure was used to determine Al in tap and natural waters in aspect of recovery of aluminum, which was added to the samples. For the first time, we tested also Al removal efficiency from water by the water filters mounted in the trip bottle.

中文翻译：

固体铋电极上超灵敏伏安铝的测定，用于水过滤器验证

这项工作提出了一种新的超灵敏方法，即使用环保耐用的铋大容量环形带状电极（BiABE）在0.04 M pH = 6.1的硫酸铵和0.003 M铜铁中测定铝-铜铁络合物伏安法。最佳测量参数包括：-700至-1250 mV相对于Ag | AgCl的电势窗口，预浓缩时间和120 s，-700 mV的电势。可以通过快速原位方法激活电极表面：通过-1300 mV的电势进行短暂调节。获得的最佳分析参数为：线性范围0.2–1.2μgL ^-1，高灵敏度1.333μA/μgL ^-1，检出限0.04μgL ^-1重复性低于2.3％。所描述的程序已使用各种CRM进行了验证。e。地表水，废水和茶叶。在99.2–103.5％的区间内获得了令人满意的恢复值。从铝的回收率来看，已开发的DPV程序用于测定自来水和天然水中的铝。我们还首次通过安装在行程瓶中的滤水器测试了水中铝的去除效率。

更新日期：2020-01-28

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