The separation and quantitative measurement of aminoacids by ion-exchange chromatography has been in use for many years ]. However, the value of this method is limited by the time required for the analysis: 6 to 23 h. Other methods, such as gas chromatography, give results more rapidly, but do not allow the separation of all amino-acids [2]. The development of cation-exchange resins, capable of...

A resin-phase extraction method has been optimized for the trace determination of tin(II) by ETAAS. Tin(II) was extracted on a finely divided anion exchange resin as the complex with ammonium pyrrolidinedithiocarbamate (APDC). The resin was collected on a membrane filter and then dispersed in 1.00 ml of 1 mol l(-1) nitric acid containing 100 microg of Pd(II) and 60 microg of Ni(II). The resulti...

Experimental measurements have been made on the batch ion exchange of Ca(II) and Mg(II) from potassium chromate solution using cation exchanger of Amberlite IRC 748 as K+ form. The ion exchange behavior of two alkaline-earth metals on the resin, depending on contact time, pH, temperature and resin dosage was studied. The adsorption isotherms were described by means of the Langmuir and Freundlic...

The purpose of this study was to use cation exchange resins mask Pregabalin's unpleasant taste. Dowex-50, a crosslinked polystyrene backbone, employed. DRCs were synthesised in batches with drug-to-resin ratios 1:1, 1:2, and 1:3. optimal ratio as well the time required for maximum complexation discovered. In work, an attempt made develop taste-masked Pregabalin solution using simple, rapid, cos...