Interference Standard 3 Back Catalog number: 52050 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 32891 1,2,4,5-Tetramethylbenzene Price on request 91936 EPA Method 505/507 - Pesticide Standard Price on request 83525 EPA Method 8330 - Calibration Mix #1 Price on request