Method 429 Alternate Standard Stock Solution, 1.2ml, isooctane

4-Bromophenol-2,3,5,6-d4, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-5, Cas.no. 152404-44-9

Sulfaguanidine monohydrate, 100 µg/ml, Methanol,

EPA Method 552.1 - Surrogate Standard