Potentiometric determination of certain alpha-aminohydroxy compounds by using an ammonia gas-sensing electrode.
A simple method is described for the determination of certain alpha-aminohydroxy compounds, based on the potentiometric measurement of ammonia released after oxidation with an excess of periodate. Ammonia is measured directly in the reaction mixture, with an ammonia gas-sensing electrode. Ethanolamine, diethanolamine, triethanolamine, serine, threonine, and glucosamine (0.3-6 mumole) can be determined with average errors of about 1-2%.
Nikolelis
D P
DP
Laboratory of Analytical Chemistry, University of Athens, 104 Solonos St., Athens 144, Greece.
Efstathiou
C E
CE
Hadjiioannou
T P
TP