Of inorganic ions

Selected Examples of the Application of Distillation to the Separation of Inorganic Ions... 

Fig. 1. Born ion self energy and the problem of inorganic ion passage through a lipid barrier.

The extent to which one ion is absorbed in preference to another is of fundamental importance it will determine the readiness with which two or more substances, which form ions of like charge, can be separated by ion exchange and also the ease with which the ions can subsequently be removed from the resin. The factors determining the distribution of inorganic ions between an ion exchange resin and a solution include ... 

The sizes of organic ions differ to a much greater extent than is the case for inorganic ions and may exceed 100-fold or even 1000-fold the average size of inorganic ions. 

An interesting consequence of selective sorption is that conditions for partition chromatography arise which may enhance the normal ion exchange separation factors. This aspect has been utilised by Korkisch34 for separation of inorganic ions by the so-called combined ion exchange-solvent extraction method (CISE). 

Factors such as dissociation, association, or solvation, which result in deviation from the Beer-Lambert law, can be expected to have a similar effect in fluorescence. Any material that causes the intensity of fluorescence to be less than the expected value given by equation (2) is known as a quencher, and the effect is termed quenching it is normally caused by the presence of foreign ions or molecules. Fluorescence is affected by the pH of the solution, by the nature of the solvent, the concentration of the reagent which is added in the determination of inorganic ions, and, in some cases, by temperature. The time taken to reach the maximum intensity of fluorescence varies considerably with the reaction. 

The product CO3 radical can react with a variety of inorganic ions including the carbonato complex of Pu(V). Thus, in a pulse radiolysis experiment, Pu(VI) in 0.05 M Na2C03, He saturated, there are the parallel reactions (17) and (18)... 

The approach to standardization used by Haaijman (53) and others (66,67), in which the fluorophor is incorporated within or bound to the surface of a plastic sphere, is more versatile than the use of inorganic ion>doped spheres, since the standard can be tailored exactly to the specifications required by the analyte species. However, this approach increases the uncertainty of the measurement because the photobleaching characteristics of both the standard and the sample must be considered. The ideal approach is to employ both types of standards. The glass microspheres can be used to calibrate instruments and set instrument operating parameters on a day-to-day basis, and the fluorophor-doped polymer materials can be used to determine the concentration-instrument response function. 

The effect of inorganic ions on the exchange reaction between Fe III) and... 

The effect of the addition of inorganic ions has been investigated using the isotopic method ( Fe or Fe) and the 2,2 -dipyridyl separation. The rate law in the presence of inorganic anions is given by... 

The selection of proper mobile phase in TLC exerts a decisive influence on the separation of inorganic ions. With a particular stationary phase, the possibility of separation of a complex mixture is greatly improved by the selection of an appropriate mobile phase system. In general, the mixed aqueous-organic solvent systems containing an acid, a base, or a buffer have been the most favored mobile phases for the separation of ionic species. The mobile phases used as developers in inorganic PLC include ... 

It would be easier to describe those classes of compounds not normally separated by RPLC than to catalogue the applications to which RPLC has been turned. Applications for reversed phase can be found in virtually every area of analysis and are reviewed regularly in the journal Analytical Chemistry. RPLC has not been in general use for the analysis of inorganic ions, which are readily separated by ion exchange chromatography polysaccharides, which tend to be too hydrophilic to separate by RPLC polynucleotides, which tend to adsorb irreversibly to the reversed phase packing and compounds which are so hydrophobic that reversed phase offers little selectivity. 

Cassidy, R. M. and Elchuk, S., Dynamic and fixed-site ion-exchange columns with conductimetric detection for the separation of inorganic ions, /. Chrom. Sci., 21, 454, 1983. 

ELCD, HECD Electrolytic conductivity (Hall) detector Thermal generation of inorganic ions... 

Fig. 3.3g. Separation of inorganic ions using indirect photometric...

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