Internal Standard Solution, 1.2ml, toluene

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

Phenthoate, 100 µg/ml, Toluene, 1ml

Seneciphylline, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 480-81-9