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首页> 外文期刊>International Journal of Electrochemistry >Solar UV Photooxidation as Pretreatment for Stripping Voltammetric Trace Metal Analysis in River Water
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Solar UV Photooxidation as Pretreatment for Stripping Voltammetric Trace Metal Analysis in River Water

机译：太阳紫外线光氧化法预处理河流水中溶出伏安法痕量金属

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摘要

The application of solar ultraviolet radiation as sample pretreatment or preparation step in stripping voltammetric analysis of trace metals in presence of low levels of dissolved organic carbon (DOC) natural water samples (river water) was studied. River water samples were collected from downstream of Warnow river (Germany) and acidified to pH of2±0.2(by addition of 1 mL of ultrapure 65% HNO3per liter sample). Furthermore, 100 μL/L of hydrogen peroxide solution (ultrapure, 30% H2O2) was added to the samples as photochemical reaction initiator. The samples were transferred to polyethylene terephthalate (PET) bottles and irradiated with solar radiation of UV-A intensity of 3.6 mW/m2for six hours, and the concentrations of Zn, Cd, Pb, and Cu were determined by differential pulse anodic stripping voltammetry (DPASV). The comparison of the values with the results obtained for the original untreated sample and artificial UV-treated one proved that solar UV radiation can be applied to the digestion of dissolved organic carbon in trace metal analysis in natural waters like river water, lake waters, well waters, and so forth.
机译：研究了太阳紫外线辐射作为样品预处理或制备步骤在低水平溶解有机碳（DOC）天然水样品（河流水）存在下的痕量金属溶出伏安分析中的应用。从德国瓦诺河的下游收集河水样品，并将其酸化至pH为2±0.2（每升样品中加入1ul的超纯65％HNO3）。此外，向样品中加入100μL/ L的过氧化氢溶液（超纯水，30％H2O2）作为光化学反应引发剂。将样品转移到聚对苯二甲酸乙二酯（PET）瓶中，并用UV-A强度为3.6 mW / m2的太阳辐射辐照六小时，然后通过微分脉冲阳极溶出伏安法测定Zn，Cd，Pb和Cu的浓度（ DPASV）。将这些值与原始未经处理的样品和经过人工紫外线处理的样品所得结果进行比较，证明了在自然水（如河水，湖水，井水，水域等等。

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