三氯甲烷标准品德国Dr

CA17739500 Trichloromethane (Chloroform) certified 5 ml

L 17739500ME Trichloromethane (Chloroform) 10 ng/l 10 ml 

XA17739500ME Trichloromethane (Chloroform) 100 ng/l 1 ml

YA17739500ME Trichloromethane (Chloroform) 5000 ng/l 1 ml