2-Perfluorohexyl ethanoic acid (6:2), 50µg/ml in Isopropanol, 1,2ml

Metronidazole, 100 µg/ml, Acetonitrile, 1ml

Tetrahydro-5-methyl-2-furanMeOH,neat,neat,100mg

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Heavy White Oil (less than 20mg/kg S) Unit : 10mL screw-capped bottle Light White Mineral Oil Heavy White Mineral Oil (20 cSt at 40°C) (70 cSt at 40°C)