Determination of antioxidants in water

GC measurement with double FID on two capillary columns of different polarity 

300-ml Erlenmeyer flask with 3-ml tilting pipette Syringes, 200 pi, 300 pi Pipettes 1 ml, 2 ml, 5 ml, 10 ml 5 ml septum flasks with beaded cap Gas-chromatographic apparatus 

from a Millipore superpure water system 2 m HCl 

Pyridine, reagent purity Standard antioxidant solution  

Internal standard solution, 2,3,, 6-tetrachlorophenol, approx. 1 mg/ml in nanograde acetone 

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