Automatic Ion Exclusion-Partition Chromatography of Acids.

Chemical, bacteriological, and toxicological properties of cyanuric acid and chlorinated isocyanurates as applied to swimming pool disinfection: a review.

“…In concentrations below 1,000 ppm as available chlorine decomposition of dichloro and trichloro derivatives in the pH range 3-14 is slow, and the nitrogen decomposition products are N2 (at pH 8. [5][6][7][8][9][10][11][12][13][14] or N2 + NCl3 (at pH 3-8.5 Melamine reacts at pH 5.8 with cyanuric acid, yielding an insoluble, chemically defined compound containing 50.58 per cent of cyanuric acid. This reaction is used for the gravimetric determination of cyanuric acid, melamine, and chlorinated isocyanurates (after treatment with sodium arsenite to remove chlorine6 3 ) and is used also in a turbidimetric modification of this method which is particularly suitable for field applications.…”

A theoretical explanation for the retention mechanism of ion exclusion chromatography

“…Again, their retention is directly proportional to their molecular surface area [18]. The same effect is observed for acidic compounds [19]. Carboxylic acids with branched chains are retained more weakly than corresponding straight chain isomers.…”

“…In addition to this salting effect [32] a change is also caused by the influence of the ionic strength on the activity coefficient [33]. Equation (19) also explains the effect of temperature [34].…”

Effects of Stationary Phase Cross-Linking and Ion-Exchange Capacity on the Retention of Carboxylic Acids in Ion-Exclusion Chromatography Using Sulfonated Resins

“…Harlow and Morman have demonstrated that the degree of cross-linking of the resin has a profound effect on the retention of carboxylic acids. 4 Weakly ionized species show more penetration into the occluded liquid phase on resins of low cross-linking than those of high cross-linking. They found that resins of lower crosslinking provided better resolution of highly ionized acids, such as HCl, from organic acids.…”