EPA Method 627 - Analytes Back Catalog number: 40022 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C14283760 Imidacloprid-olefin, certified, 10mg Price on request 92269 Citric acid [2% wt] Price on request 10294.5-100-ME N-Nitroso-L-proline Price on request