Fig. 4From: The Samuel F. B. Morse statue in Central Park: scientific study and laser cleaning of a 19th-century American outdoor bronze monumentPy-GC/MS chromatogram of sample S3 (organic coatings). Py-GC/MS chromatogram obtained upon derivatization with TMAH of sample S3, i.e. a scraping of the organic coatings. Compounds identified in the chromatogram indicate the presence of mineral wax and acrylicsBack to article page