EPA Method 548.1 Internal Standard Back Catalog number: 30078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 33941 1,4-Dichlorobenzene Price on request 30182 EPA Method 507 Analyte Mix #1 Price on request 675108 Sodium p-n-tetradecylbenzenesulfonate, 100 µg/ml, Price on request