Method 1640 Tuning Standard Back Catalog number: 53147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended PN-28S 1,2,3,5-Tetrachloronaphthalene, 1.2ml x 50ug/ml, nonane Price on request 92990 Chlorinated Pesticide Standard Price on request 10152.7-100-AN o-Anisidine,100 µg/mL,acetonitrile,1mL, Price on request