On-gel sampling for analytical investigation of dyes in pictorial artworks: new advances

While the study of inorganic components in artworks can be performed through non invasive and on site methodologies, the identification of organic materials in pictorial layers still represents a complex issue If several approaches are available for the sensitive detection of these analytes in laboratory, the sampling represents a delicate step, and it must be performed with reference to the principle on micro invasiveness This study explores the potential of an analytical procedure which takes advantage of gel substrates versatility to conduct multi analytical identification Organic compounds were directly extracted from pictorial layers in order to be analyzed by means of spectroscopic and chromatographic techniques.