Sulfide (S), 1000µg/mL in Water, 3 x 20ml Back Catalog number: 54139 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended VHG-PZNN-100 Zn, 1000 µg/mL in 5% HNO3, 100ml Price on request 56232 Germanium (Ge), 100 µg/mL in 2%-HNO3 / Water, 4x25ml Price on request 54102 Fluoride (F-) Price on request