Digoxin,1000 µg/mL,MeOH,1mL,

2,2',6-Trichlorobiphenyl ,100 µg/mL,isooctane,1mL,

Method 4 Standard 1

1,1-Dichloro-2,2-bis[4-chloro(13C6)phenyl]ethene, 1.2mL x 100ug/mL, nonane