EPA Method 8330 Analyte

17a-Ethinylestradiol, certified, 0.25g

Thiophene in Thiophene-free Benzene Units: 5x1mL ampoule, 10mL screw-capped bottle Chiron No. Concentration Light White Mineral Oil µg thiophene/g (20 cSt at 40°C)

Aldehyde Mix