Roxithromycin-d7, 2,5mg

Methoxychlor-d6 (dimethoxy-d6),100 µg/mL,MeOH,1mL

Mass-Labelled DDT & Related Compound Mix, 2µg/ml in Nonane, 1,2ml

Dichlorprop-d3,100 µg/mL,isooctane,1mL