EPA Method 531.2 - Analytes Back Catalog number: 34042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended BPS Bis(4-hydroxyphenyl) sulfone, 1.2ml x 50ug/ml, methanol Price on request 57014 Silicon (Si), 1000µg/ml in 2%-HNO3/Water, 100ml Price on request 679246 2-Chlorophenol, 500mg Price on request