1-Methyl-4-nitro-5-thioimidazole, 1g

Method 200.8 / 1638 / 1640 Internal Standard, in 2%-HNO3/Water, 4x25ml

3-Methyl-2-buten-1-thiol,100 µg/mL,MeOH,1mL,

gamma-HCH (BHC),neat,neat,10mg,