pH 4.01 buffer solution (box of 25x20mL sachet)

Sodium perfluoro-7-methyloctanesulfonate, 1.2ml x 50ug/ml, methanol

Sulfolane

gamma-HCH (BHC), 10ug/ml, Solvent-acetonitrile, Unit 10mL, # of units-1, Cas.no. 58-89-9