Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680845 Aziprotryne, 100 µg/ml, Acetonitrile, 1ml Price on request 73460 Xanthene Price on request 680143 13C6-Thiabendazole, 100 µg/ml, Acetonitrile, 1ml Price on request