EPA Method 528 Internal Standard Back Catalog number: 93188 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended M338785 Metoprolol Acid, 10mg Price on request 70437 Mirex Price on request 10237.18-100-ME Octyl methoxycinnamate, 100µg/ml in MeOH, 1ml Price on request