GFAA Initial Calibration Verification Back Catalog number: 52315 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 33042R EPA Method 531.1 - Analytes Mixture Price on request 71767 Valeraldehyde, 1000µg/ml in Water, 1ml Price on request 93924 EPA Method 515 Herbicide Acids Price on request