Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675023 Fenson, 100 µg/ml, Cyclohexane, 5ml Price on request NG-S527-1G POE (5) tallow amine, 1g Price on request 10720.12-K-T 2-Nitrobiphenyl-d9,1000 µg/mL,toluene,1mL, Price on request