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Applications of Instrumental Analysis and Chemometry to Old Roman Mortars and Stuccos

[ Vol. 6 , Issue. 1 ]

Author(s):

T. Gatta, M. Tomassetti, P. Ciancio Rossetto, R. Grossi, G. Visco and L. Campanella   Pages 80 - 87 ( 8 )

Abstract:


Small quantities of Roman mortars and stuccos from the Theatre of Marcellus and Porticus of Octavia were subjected to different instrumental techniques - thermogravimetric analysis (TG, DTG), Inductively Coupled Plasma Emission Spectroscopy (ICP-AES) and X-ray diffraction (XRD). The instrumental characterisation and chemometries allowed the stucco samples to be easily distinguished from the mortar. In practice, using the three instrumental analytical methods a total of 36 variables were obtained. The variables were then selected using PCA (Principal Component Analysis), reducing this number to 10. Lastly, using HCA (Hierarchical Cluster Analysis) a good separation was obtained between the two groups of samples (mortars and stuccos).

Keywords:

PCA, HCA, Thermogravimetric analysis, XRD, Old Roman mortar and stucco

Affiliation:

University of Rome “La Sapienza”, P.le Aldo Moro, 5, 00185 Rome, Italy.



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