PCB No. 157, 10µg/ml in Isooctane, 10ml

Theophylline

3,3’-Dimethoxybenzidine

Custom mix of C10-C16 alkyl PAHs, 25 components each 2µg/mL in Toluene (Sigma quality 155004, ACS Spectrophotometric grade): Prepared gravimetrically by weighing components and solvent to a calculated 0,2mg/mL. This product has been diluted gravimet