4-tert-Octylphenol monoethoxylate,1000 µg/mL,MeOH,1mL,

EPA Method 537 Surrogate Primary Dilution Standard, in MeOH, 1,2ml

1,4,6,7-Tetramethylnaphthalene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 13764-18-6

2,3',4,4',5,5'-Hexachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane