Table 2. Chemical composition of Cu-based foils (wt.%): Experimental results obtained via GD-OES compared to nominal compositions [43].

	Elements (wt %)
	Cu	Zn	Ni	Fe	Others
Cu PHC	99.74 ± 0.02	0.050 ± 0.002	-	0.21 ± 0.02	-
Nominal	99.95	-	-	-	0.001–0.005
Cu15Zn	85.33 ± 0.80	14.42 ± 0.67	-	-	0.25
Nominal	84–86	14–16	-	0.05	0.05
Cu18Ni20Zn	60.23 ± 0.20	20.74 ± 0.13	18.15 ± 0.13	0.023 ± 0.001	0.86
Nominal	63.0–66.5	16.5–19.5	16.5–19.5	0.25	-