Method 1640 Tuning Standard Back Catalog number: 53147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70921 3,3’-Dimethoxybenzidine Price on request 59617 Metals Standard Price on request 72121 Carbamazepine, 1000µg/ml in MeOH, 1ml Price on request