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首页> 外文期刊>Analytical chemistry >Quantitation from tafel analysis in solid-state voltammetry. Application to the study of cobalt and copper pigments in severely damaged frescoes
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Quantitation from tafel analysis in solid-state voltammetry. Application to the study of cobalt and copper pigments in severely damaged frescoes

机译：固态伏安法中tafel分析的定量。在严重受损壁画中钴和铜颜料研究中的应用

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摘要

A novel method, using Tafel plots, for quantifying electroactive species in solid materials when their voltammetric signals are strongly overlapped is described. This is applied to the analysis of submicrosamples from the highly damaged frescoes painted by Palomino (1707) in the ceiling vault of the Sant Joan del Mereat church in Valencia, Spain. These paintings, which were fired in 1936, contained cobalt smalt plus azurite mixtures, this last being altered to tenorite (CuO). The reported method provides a quantitation of the cobalt smalt/azurite, tenorite/(azurite + smalt) relationships in samples, thus providing direct information on pigment dosage (smalt/ azurite ratio) in pristine paintings, extent of alteration, and temperature experienced by the frescoes during the gunfire episode. Distinction between Palomino paintings and other painters was clearly obtained due to the presence of malachite in these last.
机译：描述了一种使用塔菲尔图的新颖方法，当固体信号的伏安信号强烈重叠时，该方法可以量化固体材料中的电活性物质。该方法可用于分析西班牙巴伦西亚Sant Joan del Mereat教堂天花板穹顶中Palomino（1707）绘制的壁画严重受损的壁画中的亚微量样品。这些画作于1936年被烧制而成，包含钴smalt和蓝晶石混合物，最后将其更改为ten石（CuO）。报道的方法可定量分析样品中钴的smalt / azurite，ten石/（azurite + smalt）的关系，从而提供有关原始绘画中颜料用量（smalt / azulite比），变化程度和温度的直接信息。枪声发作期间的壁画。由于孔雀石的存在，帕洛米诺绘画与其他画家之间的区别得到了明显的区分。

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