Organic Surrogate Standard Back Catalog number: 92654 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50592 Copper (Cu) - 5 PPM Price on request MPFHXS Sodium perfluoro-1-hexane[18O2]sulfonate, 1.2ml x 50ug/ml, methanol Price on request C15123010 4-Methyl-2-pentanone-2,4-dinitrophenylhydrazone, 100mg Price on request