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Optimal Sample Preparation for the Analysis of Micrometric Heterogeneous Samples
DOI:
10.1021/acs.analchem.5b01997
PMID:
26023879
Authors:
Victoria
Beltran
(Universitat Politechnica de Catalunya)
,
Nati
Salvado
(Universitat Politecnica de Catalunya)
,
Salvador
Buti
(Universitat Politecnica de Catalunya)
,
Gianfelice
Cinque
(Diamond Light Source)
,
Katia
Wehbe
(Diamond Light Source)
,
Trinitat
Pradell
(Universitat Politechnica de Catalunya)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Analytical Chemistry
, VOL 87 (13)
State:
Published (Approved)
Published:
June 2015
Abstract: Precise microanalytical techniques are essential in many fields such as cultural heritage materials, showing complex layered microstructures containing a wide range of materials of diverse nature and hardness. Noninvasive sample manipulation and preparation is required to avoid, as much as possible, sample contamination, which may strongly limit the materials identification. The method proposed consists in the application of thin gold or carbon protecting layers before embedding the samples in synthetic resin for microtoming. The validity and optimal procedure is checked for those materials most often found on the surface of paintings: varnishes (natural resins and wax). An artwork sample is similarly prepared and analyzed by optical microscopy (OM), scanning electron microscopy (SEM/EDS), micro-infrared spectroscopy (mu FTIR/muSR-FTIR), and X-ray diffraction (mu SR-XRD) with synchrotron light.
Subject Areas:
Technique Development
Instruments:
B22-Multimode InfraRed imaging And Microspectroscopy