13C3-Caffeine, 100 µg/ml, Methanol, 1ml Back Catalog number: 681491 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended EC9605-CVS PCB Calibration Solutions for GC/MS Calibration Kit, 5 x 500ul, isooctane Price on request N-11054-1G Allyl alcohol, 1g Price on request 673551 Dieldrin, 10.0 µg/ml, Ethyl acetate, 10ml Price on request