Method 1640 Tuning Standard Back Catalog number: 53147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679847 Triphenyl phosphite, 100 µg/ml, Methanol, 1ml Price on request 57114 Silicon (Si) Price on request 676134 S-Metolachlor Metabolite CGA 50720, 100 µg/ml, Ac Price on request