Unilateral NMR: a Noninvasive Tool for Monitoring In Situ the Effectiveness of Intervention to Reduce the Capillary Raise of Water in an Ancient Deteriorated Wall Painting

Table 2

Average elemental compositions in atomic % obtained by EDS analysis of samples S1–S5. Each value was obtained by averaging the elemental compositions measured on three areas of the same sample (standard deviation values in parentheses).

	Elements (atomic %)
Sample	Na	Mg	Al	Si	S	Cl	K	Ca	Fe
S1	—	0.34 (0.18)	0.46 (0.15)	0.72 (0.21)	17.23 (0.29)	0.60 (0.06)	—	80.43 (0.51)	0.22 (0.01)
S2	—	0.23 (0.11)	1.04 (0.22)	2.15 (0.32)	40.94 (0.85)	0.78 (0.02)	—	54.42 (0.68)	0.45 (0.10)
S3	—	0.19 (0.04)	0.78 (0.09)	1.61 (0.21)	35.17 (1.89)	0.64 (0.08)	—	61.32 (2.20)	0.29 (0.10)
S4	—	0.74 (0.21)	0.57 (0.04)	0.77 (0.12)	—	0.50 (0.03)	—	97.19 (0.37)	0.24 (0.02)
S5	0.96 (0.22)	0.52 (0.17)	2.47 (0.45)	5.66 (1.35)	37.53 (1.33)	0.70 (0.05)	0.32 (0.08)	50.77 (1.29)	1.07 (0.31)