Micro-XRF analysis of a Brazilian polychrome sculpture

被引：16

作者：

Freitas, Renato P. ^{[1
]}

Felix, Valter S. ^{[1
]}

Pereira, Marcelo O. ^{[2
]}

Santos, Ramon S. ^{[3
]}

Oliveira, Ana L. ^{[1
]}

Goncalves, Elicardo A. S. ^{[1
]}

Ferreira, Douglas S. ^{[1
]}

Pimenta, Andre R. ^{[1
]}

Pereira, Leandro O. ^{[1
]}

Anjos, Marcelino J. ^{[3
]}

机构：

[1] LISCOMP IFRJ CPAR, Lab Instrumentacao & Simulacao Computat, BR-26600000 Paracambi, Brazil

[2] Ctr Fed Educ Tecnol Celso Suckow Fonseca, Campus Nova Iguacu, BR-26041271 Nova Iguacu, Brazil

[3] Univ Estado Rio De Janeiro, IFADT, Rua Sao Francisco Xavier 524, BR-20550013 Rio De Janeiro, RJ, Brazil

来源：

MICROCHEMICAL JOURNAL | 2019年 / 149卷

关键词：

Micro-XRF; Historical pigments; Micro-XRF data analysis; MA-XRF; SYNCHROTRON-RADIATION; RAMAN-SPECTROSCOPY; PIGMENTS; FRAGMENTS; PAINTINGS; VERSION; TOOL;

D O I：

10.1016/j.microc.2019.104020

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this work, microsamples extracted from a Saint John the Evangelist polychrome sculpture, dating from the beginning of the eighteenth century and found in Rio de Janeiro, Brazil, were analyzed with micro-XRF and complimentary X-ray Fluorescence (XRF) techniques, Raman Spectroscopy, and Optic Microscopy (OM). As a result of the study, the pigments azurite [2CuCO(3)'Cu(OH)(2)], massicot (PbO), vermilion [HgS], calcite [CaCO3] and gypsum [CaSO(4 center dot)2H(2)O] were characterized. Through the images obtained by the microelemental mapping, it was verified that some tonalities were produced by pigment mixing, i.e., the green polychrome on the sculpture resulted from a mix of azurite and massicot. In addition to the characterization of the materials used in the sculpture, numerical iterations were implemented using Python programming language to perform correlations between the elemental maps, the values of which were validated by the results of the study.

引用

页数：6

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