Citric acid [0.3% wt]

Detector Linearity Check Unit: 2x1mL 25 % w/w # 2 Diesel Fuel in n-Hexadecane 50 % w/w # 2 Diesel Fuel in n-Hexadecane

Butyric acid, 250μg/ml in Water, 1ml

Atrazine-d5 (ethyl-d5),1000 µg/mL,acetonitrile,1mL,