8260Matrix Spike Back Catalog number: 97031 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1112.20-10MG 6-Nitrobenzo[a]pyrene-d11,neat,neat,10mg, Price on request 51061 ASTM D-4815 Calibration Mix #4 Price on request 9967.29-100-IO alpha alpha alpha (20R,24RS)-24-Ethylcholestane (82% in mixture with alpha alpha alpha (20S,24RS)-24-Ethylcholestane), 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. Price on request