Table 1.

Elementals analysis of the particles.

Element	Wt%
	A1	A2	A3	Y1	Y2	Y3
C	61.69	63.51	37.36	57.08	56.89	52.08
N	0.00	0.00	0.00	0.00	0.00	0.00
O	22.42	28.47	45.66	39.74	33.74	19.58
P	0.00	0.60	0.00	0.15	0.02	0.00
Ca	0.18	1.41	13.49	0.25	0.08	4.44
Ag	0.32	0.51	0.00	0.00	0.00	0.00
Au	15.39	5.50	3.49	2.78	9.27	23.91
Total	100.00	100.00	100.00	100.00	100.00	100.00