Internal Standard Back Catalog number: 93185 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 672919 Fluoroglycofen-ethyl, 250mg Price on request 52119 EPA Method 300.0 Anions Method B Price on request ACQ-WH20-030 Ethanol standard in whole blood,2.0g/L,whole blood, 3mL Price on request