Interference Standard 4 Back Catalog number: 53041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11030.10-100-CY Tolylfluanide-d7 (71.2%),100 µg/mL,isooctane,1mL, Price on request 677805 Caproic acid, 1ml Price on request 50304 Metals Mix #1 Price on request