Calibration Standard Set Back Catalog number: 53042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9689.0-120-5HC Descarbamoylgonyautoxin-2 and -3, 116+26.1µM, Solvent-HCl/AcOH(Aq), Unit 0.5mL, # of units-1, Cas.no. Price on request DF-IS-A40 Mass-Labelled PCDD Internal Standard Solution, 1.2ml x 40ng/ml, nonane Price on request 31282 EPA Method 507 Nitrogen Phosphorus Pesticides Price on request