Calibration Standard Mix 4

Bis(4-tert-butylphenyl) phenyl phosphate, 1.2ml x 50ug/ml, toluene

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

Phenanthrene-d10, 1000µg/ml in MethyleneChloride, 1ml