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Raman, X-Ray Fluorescence Spectroscopies and Graphene Oxide Modified Screen Printed Electrodes to Identify the Pigments and Earth Present in Ancient Leather Samples
Electroanalysis ( IF 3 ) Pub Date : 2017-10-23 , DOI: 10.1002/elan.201700457
Federica Valentini 1 , Marina Bicchieri 2 , Andrea Calcaterra 3 , Maurizio Talamo 3
Affiliation  

Micro-Raman and X-Ray Fluorescence combined with electrochemical techniques proved to be suitable for the unambiguous identification of the green pigment in a very deteriorated historical leather. The colouring matter resulted in a mixture of blue and yellow. Raman identified the blue indigo, whereas iron and arsenic were identified by XRF. The redox status of these two elements was investigated by Square Wave Cathodic Stripping Voltammetry (SWCSV). Results demonstrated the presence of As(III), probably As2S3 (orpiment), and Fe(III), characterising the red earths. The quantitative results obtained by SWCSV were also confirmed for Fe and As by ICP-MS (Inductively Coupled Plasma Mass spectrometry). Voltammetric techniques, applied here for the identification of the redox status of the elements, contained in pigments, are useful to understand two important aspects: the chemical-physical composition of the colors and the best strategy to be applied for the preservation of the pigments in ancient/deteriorated artwork objects.

中文翻译:

拉曼、X 射线荧光光谱和氧化石墨烯改性丝网印刷电极,用于识别古代皮革样品中的颜料和地球

微拉曼和 X 射线荧光与电化学技术相结合,被证明适用于明确识别非常退化的历史皮革中的绿色颜料。着色物质导致蓝色和黄色的混合物。拉曼鉴定了蓝色靛蓝,而铁和砷则通过 XRF 鉴定。这两种元素的氧化还原状态通过方波阴极溶出伏安法 (SWCSV) 进行了研究。结果表明存在 As(III),可能是 As2S3(雌性)和 Fe(III),它们是红土的特征。SWCSV 获得的定量结果也通过 ICP-MS(电感耦合等离子体质谱法)对 Fe 和 As 进行了确认。伏安技术,在此用于识别颜料中所含元素的氧化还原状态,
更新日期:2017-10-23
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