EPA Method 8121 Internal Standard Back Catalog number: 81203 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 57212 Magnesium (Mg) Price on request 59627 pH 10.0 Standard @ 25°C Price on request S-4393-1 S-4393-1 B[a]P/HCB Calibration Standard 2 (solvent : n- Nonane) Product S-4393-1 S-4393-2 S-4393-3 S-4393-4 S-4393-5 1356,6 Hexachlorobenzene 0,01 µg/mL 0,05 0,1 Price on request