skip to main content

SciTech ConnectSciTech Connect

Title: Pigments Elementary Chemical Composition Study of a Gainsborough Attributed Painting Employing a Portable X-Rays Fluorescence System

The investigated painting, identified with the title 'The woodman', is attributed to Thomas Gainsborough (XVIII century) and is under investigation at the Laboratory of Conservation Science (LACICOR), CECOR/EBA/UFMG. The measurements were carried out with a portable X-rays fluorescence (XRF) system constituted of a X-rays tube with Ag anode, a Si PIN - diode detector, nuclear electronic chain and a special designed mechanical system for the detector and X-ray tube positioning, that enables angular and XYZ movements of the excitation-detection system. The employed voltage and current intensity were 17 kV and 3 mA, respectively. The time of acquisition for each measurement was 500 s. XRF spectra were analyzed using the AXIL-WinQXAS software. Three measurements in each of the following regions of the painting were done: face, leaves, arm, sky and firewood. The carried out analysis indicated the following pigments: White (lead white and calcium sulfate, identified by the elements Pb, Ca and S), Blue (Prussian blue, identified by the key element Fe), Red (Vermilion, identified by the elements Hg and S) and Brown (mixture of Fe and Mn oxides, identified by the elements Fe and Mn). Elements belonging to modern pigments corresponding to the same colors were absent in the analyzedmore » spectra.« less
Authors:
;  [1] ; ;  [2]
  1. State University of Londrina, Department of Physics, Londrina, PR (Brazil)
  2. Federal University of Minas Gerais, EBA/CECOR/LACICOR Belo Horizonte, MG (Brazil)
Publication Date:
OSTI Identifier:
21054867
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 884; Journal Issue: 1; Conference: 6. Latin American symposium on nuclear physics and applications, Iguazu (Argentina), 3-7 Oct 2005; Other Information: DOI: 10.1063/1.2710629; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; A CODES; CALCIUM; CALCIUM SULFATES; CHEMICAL COMPOSITION; CULTURAL OBJECTS; EXCITATION; FERROCYANIDES; IRON; LEAD; MANGANESE; MIXTURES; MULTI-ELEMENT ANALYSIS; PIGMENTS; QUANTITATIVE CHEMICAL ANALYSIS; SI SEMICONDUCTOR DETECTORS; SULFUR; WOOD FUELS; X-RAY FLUORESCENCE ANALYSIS; X-RAY TUBES