EPA Method 507 - Performance Check Solution Back Catalog number: 19130 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11651.8-K-ME Dopamine,1000 µg/mL,MeOH with 5% 1 M HCl,1mL, Price on request 11996.12-10MG Hydroxytolbutamide-d9 (butyl-d9),neat,neat,10mg Price on request MFTA-MXA Mass-Labelled FTA Solution/Mixture, 2µg/ml in Isopropanol, 1,2ml Price on request