The Structure of the F Region of the Ionosphere

Weiß, A.

doi:10.1071/ph530291

Cited by 7 publications

(6 citation statements)

References 5 publications

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“…So far, in ion chromatography, some non-conventional types of ion exchangers, such as superficial [112][113][114], supported [115,116] and pellicular resins [II7,118], with capacity values from 10 to 1000 times lower than those of conventional resins have been used [119]. However, the preparation procedures of these ion-exchange materials is much more complex than those of conventional resins and incomparably more complex than the preparation of SISIE.…”

Section: Aminecarboxylate Interaction Of Amino Acid Moleculesmentioning

confidence: 99%

Surface Impregnated Sulfonate Ion Exchangers: Preparation, Properties and Application

Muraviev

1998

Solvent Extraction and Ion Exchange

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This paper reviews the results obtained by studying Surface Impregnated Sulfonate Ion Exchangers (SISIE) obtained by modification of macroporous or gel polysterene-divinylbenzene polymers with toluene solutions of dinonylnaphthalene sulfonic acids. Capacities of SISIE of the first type are directly proportional to the concentration of the modifying solution and to the specific surface area of the matrix. Capacities of gel SISIE are much less than those of macroporous samples and depend on the crosslinking of the matrix.Stabilization of SISIE capacity and improvement of their kinetic properties can be achieved using "wet drying " technique. Successive impregnation of the same SISIE sample may be used to increase the capacity of the resin. The ionexchange properties of SISIE are mainly determined by their micellar structure which also defines the areas of possible applications of these ion-exchange materials such as, e.g. ion chromatography and some others Several models have been successfully applied to describe the features of ion exchange processes on SISIE. Application of SISIE as convenient model systems to study aminecarboxylate interaction of amino acid molecules is illustrated by suspension effects measured in SISIE-zwitterlyte and SISIE-HCI suspensions and by the results obtained by the laser-acoustic study of these systems. ') Present address:

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Section: Aminecarboxylate Interaction Of Amino Acid Moleculesmentioning

confidence: 99%

Surface Impregnated Sulfonate Ion Exchangers: Preparation, Properties and Application

Muraviev

1998

Solvent Extraction and Ion Exchange

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“…The differences of these two potential values are given as AE, while the calculated values of AEC are based on the individual liquid-junction potentials calculated on the basis of Hender- son's equation (3,4). The latter equation was used rather than Planck's equation on the basis that the potentials of continuous mixture junctions and of free diffusion junctions, such as those formed with a congealed salt-agar bridge, are given by the Henderson equation (cf.…”

Section: Resultsmentioning

confidence: 99%

Conversion of polarographic and other potentials from one reference electrode to another

Tsuji¹,

Elving²

1969

Anal. Chem.

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Measured potential data from electrochemical measurements-e.g., half-wave potentials obtained in the polarography of aqueous systems-are commonly recorded against the saturated calomel electrode (SCE). Although these values inevitably include the liquid-junction potentials between saturated KC1 and sample solutions, which can be fairly largee.g., if the sample solution is strongly acidic-they are nevertheless useful, at least for the comparison of data from different laboratories. Actual polarographic measurements, for example, are not always carried out using SCE as the reference electrode. Thus, a mercurous sulfate electrode (MSE) is sometimes used as the external reference electrode because of its supposed merit of less polarization on current passage (/) or to avoid contamination of the sample solution by chloride ion. In such cases, the measured potential values have to be converted to the SCE basis by correcting for the potential difference between the two reference electrodes. There seems to be no standard procedure for the measurement of this potential difference if the normal electrode half-reaction data are not used; the most common one would presumably involve measuring the emf of a galvanic cell comprising the two electrodes in direct contact with each other-e.g., a galvanic cell consisting of SCE and MSE connected to each other by a saturated KC1 bridge.Because published polarographic potential data thus obtained are most useful if they can be duplicated, within experimental error, when the polarography of the identical solu-1 Present address,

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“…One way is to use column packing materials which have a nonporous core and a porous outer shell (Figure 1). The advantage of perform- ing lc separations whereby solutesorbent interactions occur only to a limited depth in the outer shell of the sorptive particle was pointed out by Weiss (11). Horn et al (12) indicated that high-speed lc separations should be feasible with nonporous supports having thin, uniform surfaces of sorbent operated at high moving-phase velocities.…”

Section: Specialized Column Packingsmentioning

confidence: 99%

Columns for modern analytical liquid chromatography

Kirkland¹

1971

Anal. Chem.

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A nalytical chemists are constantly seeking new tools which permit them to solve the increasingly complex problems with which they are confronted. Sometimes a revitalized form of an old tool appears which offers new opportunities.Liquid chromatography (lc) now fits this category. New forms of lc are now emerging which promise that this technique will be one of the most powerful and widely used analytical approaches.

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The Structure of the F Region of the Ionosphere

Cited by 7 publications

References 5 publications

Surface Impregnated Sulfonate Ion Exchangers: Preparation, Properties and Application

Surface Impregnated Sulfonate Ion Exchangers: Preparation, Properties and Application

Conversion of polarographic and other potentials from one reference electrode to another

Columns for modern analytical liquid chromatography

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