EPA method 200.7 calibration kit

Tolchlophos-methyl,100 µg/mL,MeOH,1mL,

Endrin ketone, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 53494-70-5

3,3',4,5,5'-Pentachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane