EPA Method 1666 Standard #1

2,2',3,5',6-Pentachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

Sodium perfluoro-1-tridecanesulfonate, 50µg/ml MeOH, 1,2ml

Ethanol (1% w/v), 10mg/mL in water, 1ml