Silver nitrate (40 g/L) TS, Validity: 12 months

Silver standard (5 g Ag/ml) TS, Validity: 6 months

Sodium acetate (0.04 mol/l) VS, Validity: 12 months

Sodium acetate (150 g/L) TS, Validity: 24 months

Sodium acetate (50 g/L) TS, Validity: 24 months

Sodium acetate (60 g/L) TS, Validity: 24 months

Sodium acetate/glacial acetic acid (0.1 mol/l) VS, Validity: 12 months

Sodium alizarinsulfonate (1 g/L) TS, Validity: 12 months

Sodium alizarinsulfonate (10 g/L) TS, Validity: 12 months

Sodium arsenite (0.05 mol/l) VS, Validity: 12 months