Internal Reference Standard

Isopropyl ether

DL-Methadone-d9 hydrochloride

Aromatics Calibration Standards Kit (3 Internal Standard Version) 24 Analytes + 3 ISTD, each Vol.% as listed in isooctane; unit: 5x1mL Set, one of each Std. 1- 5 + opt. 1x1mL (Std. 6) To these calibration standards are 3 fluorinated Internal Standard