QualityCheck hardness sample

Terbium (Tb)

2,3,3',4,4',5,5'-Heptachlorobiphenyl, 100 µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 39635-31-9

ISO 8165-1 Internal Control Stock Standard Solution 2 2,5-Dibromophenol [28165-52-8] 2470,6