Features:
1) Silver ingot and silver grain available
2) High purity silver standard: Q/SHM03-2000
3) Other standard: GB4135-94
4) Chemical composition (%):
a) High purity silver: Ag≥99.996, Bi＝0.001,Cu＝0.001, Fe＝0.001,
Pb＝0.001
b) Ag-1; Ag≥99.99, Bi＝0.002, Cu＝0.003, Fe＝0.001, Pb＝0.001, Sb＝0.001
c) Ag-2; Ag≥99.95, Bi＝0.004, Cu＝0.025, Fe＝0.003, Pb＝0.005, Sb＝0.002
d) Ag-3; Ag≥99.9