QC Standard 2 Back Catalog number: 53085 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 57740 Zirconium (Zr) Price on request 680443 beta-HCH, 100 µg/ml, Methanol, 1ml Price on request 673486 Bromophos-ethyl, 10.0 µg/ml, Ethyl acetate, 10ml Price on request