The examination of Van Gogh’s chrome yellow pigments in ‘Field with Irises near Arles’ using quantitative SEM–WDX

Heritage Science

Table 1 Summary of the SEM–WDX and Raman results of chrome yellow containing paint samples taken from Field with Irises near Arles

Sample ID	(Probable) location	SEM–WDX estimated fraction of lead(II) sulphate in chrome yellow (mol%)	Raman estimated fraction of lead (II) sulphate in chrome yellow (mol%)^a
F409/2	Brown yellow buttercups in foreground	6	0
F409/3 dark yellow	Yellow paint from the field in the background	50	50
F409/3 medium yellow	Yellow paint from the field in the background	51	50
F409/3 light yellow	Yellow paint from the field in the background	51	50
F409/6	Yellow green paint from the field	24–42	25–50^b
F409/7a	Brown yellow buttercups in foreground	5	0

^aEstimation based on the method described by Monico et al. [20]
^bThe signals in the Raman spectrum are very weak so peak assignments are uncertain