Multi-Element Internal Std., 10ug/ml, 4x25ml Back Catalog number: 52319 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 93918 Pesticide Mix #1 Price on request A16815400AM-100 Robenidine HCl, 100µg/mL in Acetone:MeOH, 1ml Price on request 20061 CLP Pesticide Lab Control Standard Price on request