Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679028 15N2-Chloridazon-desphenyl, 100 µg/ml, Acetonitri Price on request 50336 Metals Mix Price on request 677906 EPN, 100 µg/ml, Ethyl acetate, 1ml Price on request