Table 5. P-XRF analysis results of metal fittings and lock (wt%)

Sample ID	Element (wt%)
	Cu	Zn	Fe	Cr	S	Cu + Zn
Front butterfly ornament (L)	57.33	32.74	0.72	2.06	2.88	90.07
Front butterfly ornament (R)	58.88	34.14	0.58	0.08	2.56	93.03
Interior hinge	59.87	34.29	0.40	0.12	2.45	94.16
Drawer handle	66.71	20.61	0.62	-	0.77	87.32
Drawer handle fixing nail	60.34	34.30	0.46	0.05	1.75	94.65
Interior hinge fixing nail	55.05	31.91	9.84	0.07	1.51	86.95
Lock – Taeguk (white)	0.43	0.02	80.51	16.55	0.08	0.45
Lock – Taeguk (red)	89.77	5.61	0.26	-	2.19	95.38
Lock – Body (yellow)	62.93	33.22	0.48	-	0.53	96.15
Lock – Key 1	62.41	32.96	0.58	-	1.74	95.37
Lock – Key 2	60.31	32.74	0.37	0.05	3.01	93.05

-: below the limit of detection (LOD).
P-XRF: portable X-ray fluorescence.