2,3,7,8-TetraCDD(13C12,99%).2000ng/mL2,3,4,7,8-PentaCDF (13C12,99%)2000ng/mL1,2,3,7,8-PentaCDD (13C12,99%) . 2000 ng/mL 1,2,3,4,7,8-HexaCDF (13C12,99%) 2000 ng/mL1,2,3,4,7,8-HexaCDD (13C12,99%) . 2000 ng/mL1,2,3,6,7,8-HexaCDF (13C12,99%) 2000 ng/mL1,2,3,6