Multi-Element Internal Std., 10ug/ml, 4x25ml

Thiophene in Toluene Units: 5x1mL ampoule, 1x10mL screw-capped bottle Chiron No. Concentration µgS/g (ppm) Wt.% S-4053-0 Blank 0 S-4053-K 1 000 0.1000 S-4053-2.5K 2 500 0.2500 S-4053-5K

Manganese (Mn)

Vitamin B12 (Cyanocobalamin), 100mg