R. Gilbert, Reynald. Rioux, S. E. Saheb
1984
Citations
2
Influential Citations
75
Citations
Quality indicators
Journal
Analytical Chemistry
Abstract
The analysis by ion chromatography (IC) has been successfully applied for the quantification of morpholine (C/sub 4/H/sub 9/NO) and cyclohexylamine (C/sub 6/H/sub 11/NH/sub 2/) in aqueous solutions containing parts-per-million amounts of ammonia (NH/sub 3/) and hydrazine (N/sub 2/H/sub 4/). The method is proven to be sensitive and selective at the concentration ranges normally found during water treatment of steam-generating systems. The column length, eluent flow rate, and eluent ionic strength have been optimized to obtain satisfactory resolution of the peaks of the four cations C/sub 4/H/sub 10/NO/sup +/, C/sub 6/H/sub 11/NH/sub 3//sup +/, NH/sub 4//sup +/, and N/sub 2/H/sub 5//sup +/ under three analytical modes. The analysis time for all those modes is approximately 50 min. The detection limits are better than those obtained with conventional methods, being 0.1 ppm for both morpholine and cyclohexylamine. None of the water constituents known to interfere with the conventional technique hampers the IC determination. Furthermore, under the amine analytical conditions, this technique allows determination of concomitant species present as impurities in steam-water cycles. 15 references, 1 figure, 4 tables.