EPA Method 531.1 Individual Analytes Back Catalog number: 30041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10943.39-K-CF Phosphatidylethanol-d5 ammonium salt,1000 µg free acid/mL,chloroform,1mL, Price on request P48-M-PAR Precision and Recovery Stock Solution: Marker PCBs, 1.2ml, nonane Price on request 72261 Tetrahydrofuran-d8 Price on request