Method 1640 Tuning Standard Back Catalog number: 52147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended L-PFDS Sodium perfluoro-1-decanesulfonate, 1.2ml x 50ug/ml, methanol Price on request 97379 VOC Standard Price on request 41004 EPA Method 608Mix #4 Price on request