Malaoxon, 100 µg/ml, Toluene, 5ml

N-(4-chloro[13C6]phenyl)-N'-(3,4-dichloro[13C6]phenyl)[13C]urea , 1.2ml x 50ug/ml, methanol

Methyl-tert-butylsulfide, neat, Solvent-neat, Unit 5mL, # of units-1, Cas.no. 6163-64-0

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)