AUTOMATIC-DETERMINATION OF TOTAL ALIPHATIC-AMINES BY ONLINE PHOTOMETRIC LIQUID-LIQUID MICROEXTRACTION

An automatic flow method for the determination of total aliphatic amin es has been developed. Using an integrated micro extraction unit at th e detection point that allows continuous on-line monitoring of small o rganic plug from which amines are extracted. It is based on the format ion of ion-pairs between aliphatic amines and sodium 1,2-naphthoquinon e-5-sulphonate that are subsequently extracted into chloroform. The gr adual enrichment of the organic phase with the ion-pair is continuousl y monitored at 460 nm. Absorbance readings at a fixed time and the slo pes of absorbance-time recordings are the measured parameters used for determination purposes. The proposed method has been applied to the d etermination of total aliphatic amines in both synthetic and real (foo d) samples.