Table 3. Silver recovery from dental amalgam residues using sucrose as reducing agent.

Sample mass (g)	Total time (min)	Amount of Agº produced (g)	Purity (%)	% recovery ª (32.5% of amalgam)
25.0	303	3.9	99.9	24.4
50.0	430	15.5	49.3	48.4
50.0	360	9.2	94.2	28.8
50.0	373	23.0	87.1	71.9
110.7	390	41.5	52.6	58.6
120.0	330	61.1	44.1	79.6
134.4	455	54.0	19.6	62.8
150.0	600	59.1	84.1	61.6
150.0	440	64.5	86.0	67.2
150.0	365	62.1	52.9	64.7
150.0	565	87.9	37.0	91.6

^ªBased on the American Dental Association (ADA) 1 , which considers that the percentage of silver in dental amalgam is 32.5%.