SPECIFICATION RESULT Content%99.999%Min 99.9999% Residue on ignition 0.001%Max 0.00096% Ni 0.00001%Max 0.0000099% Zn 0.00005%Max 0.000045% Ca 0.00001%Max 0.0000099% Pb 0.00005%Max 0.000043% Fe 0.00001%Max 0.0000086% Cu 0.00001%Max 0.0000086% Ag 0.00005%Max 0.000045% Ti 0.0005%Max 0.00043% Bi 0.00001%Max 0.0000086%