EPA Method 528 Internal Standard Back Catalog number: 93188 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59917 ICP / OES Mix Price on request 678948 Fipronil-desulfinyl, 100 µg/ml, Acetonitrile, 1m Price on request 10666.17-50-AN 15-Acetoxyscirpenol Price on request