ICP-MS Internal Standard

1,5-Bis-(4-chlorophenyl)-biguanide HCl, neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 13590-98-2

EPA Method 418.1 - Total Petroleum Hydrocarbons

Fosthiazate, 100 µg/ml, Acetonitrile, 5ml