Multi-Element Internal Standard Back Catalog number: 50160 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59117 Metals Mix Price on request 92800 EPA Method 8141A/1657 - Analytes Price on request 2017.6-20K-ME Fluorobenzene,20000 µg/mL,MeOH,1mL, Price on request