. 2017 Jul 12;7:5259. doi: 10.1038/s41598-017-05693-3

Table 1.

Total content and released fraction of metals on Type I, II, and III surfaces.

	Total Au (µg/cm²)^a	Total Ag (µg/cm²)^a	Released Ag⁺ (µg/cm²)^a
	Total Au (µg/cm²)^a	Total Ag (µg/cm²)^a	0.5 h	0.5 h laser	5 h	24 h
Type I	3.0 (0.5)	0.32 (0.03)	—^b	—^b	0.026 (0.003)	0.028 (0.003)
Type II	2.7 (0.3)	0.30 (0.03)	—^b	—^b	—^b	—^b
Type III	2.8 (0.3)	0.9 (0.1)	0.04 (0.02)	0.05 (0.02)	0.18 (0.02)	0.21 (0.01)
	After aqua regia		In contact with deionized water

(see also SI10).

^aAverage values from at least three samples with standard deviations reported between brackets; ^bUnder detection limit.