VPH Primary Calibration Spike Rev 1.0 Back Catalog number: 92109 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11902.19-K-ME Protriptyline hydrochloride ,1000 µg base/mL,MeOH,1mL, Price on request 680059 Sudan Yellow, 250mg Price on request 91040 cis-1,2-Dichloroethene, 5000µg/ml in MeOH, 1ml Price on request