Quintozene, 100 µg/ml, Ethyl acetate, 1ml

N-Nitrosodiisopropylamine, 1000µg/mL in MeChl, 1ml

Initial Check Verif. Standard 4, in 4%HNO3, 100ml

Perfluorooctanesulfonic acid, 100µg/mL in MeOH,1ml