Ion-Chromatographic Determination of Borates and Sulfides with the Use of a Developing Column

Aspects of the sensitive and selective determination of borates and sulfides were considered. A method was proposed for substantially increasing the sensitivity of the ion-chromatographic determination of weak acids by their conversion into corresponding salts on an auxiliary column with a cation exchanger in the K form. It was demonstrated that the detection limit of the cations under consideration can be decreased to 5–10 µg/L and the selectivity of the method is sufficient for the determination of trace borates in strongly mineralized waters like sea water.__________Translated from Zhurnal Analiticheskoi Khimii, Vol. 60, No. 8, 2005, pp. 832–836.Original Russian Text Copyright © 2005 by Kolotilina, Dolgonosov.