Method 1640 Tuning Standard Back Catalog number: 53147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50227 Mix #1 Price on request 677715 2,4-Dimethylphenol, 100 µg/ml, Acetonitrile, 1ml Price on request 678214 Benzobicyclon, 10.0 µg/ml, Acetonitrile, 10ml Price on request