Selenium (Se) Back Catalog number: 58034 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 688320 Bromodichloroacetic acid, 100µg/ml in Water, 1ml Price on request 10689.52-10-ME Microcystin LF Price on request 40012 EPA Method 607 - Nitrosamines Price on request