L-Histidine hydrochloride monohydrate, 250mg

2,3,6,7-Tetrachloro[13C12]biphenylene, 1.2ml x 50ug/ml, nonane

Non-Derivatives Mix #2

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)