Anion-exchange paper

Cellulose anion-exchange paper chromatography with 5% acetic acid-n-propanol (5 1) gave good separation, detected by U.V. light, of aspirin (Rf. 0.07) from salicylic acid (Rf. 0.51).107... 

Abe, S., Weisz, H. The rapid separation and determination of uranium (IV) by use of DEAE anion-exchange paper and the ring-oven technique. Mikrochim. Acta 550 (1970)... 

Note This data is for SB-2 anion exchange paper, available from H. Reeve-Angel and Company. 

Inoue, H., Kagoshima, M., Yamasaki, M. and Honda, Y. 2004. Radioactive iodine waste treatment using electrodialysis with an anion exchange paper membrane. 

COUNTING RADIOACTIVE NUCLEOTIDES ON ANION EXCHANGE PAPER DISKS ... 

The strong-base anion-exchange paper has been employed (38) in the hydroxide form for the separation of free and taurine-conjugated bile acids with diisobutyl ketone-acetic acid-water (4 5 1, v/v/v) or chloroform-methanol-ammonia (4 1 0.1, v/v/v) as developing solvents. It would be anticipated that these systems would also be capable of resolving glycine-and taurine-conjugated bile acids. 

Glowiak, B., and Gostomczyk, A., 1970, Sulfur Dioxide Sorption on Anion Exchangers, paper presented at Second International Clean Air Congress of the International Union of Air Pollution Prevention Association, Washington, D.C., Dec. 6-11. 

Rxn. with MSCN Complex formation and dissocn. by electrophoresis and anion exchange paper chromatography M Na, K (2585) ... 

Amberlite IRA-904 Anion exchange resin (Rohm and Haas) [9050-98-0]. Washed with IM HCl, CH3OH (1 10) and then rinsed with distilled water until the washings were neutral to litmus paper. Finally extracted successively for 24h in a Soxhlet apparatus with MeOH, benzene and cyclohexane [Shue and Yan Anal Chem 53 2081 1981]. Strongly basic resin also used for base catalysis [Fieser Fieser Reagents for Org Synth 1511, Wiley 1967]. 

The created technology of producing cationic and anionic exchange fibroid sorbents on the base of polyacrylonitrilic fibers is described in the paper. Chemical characteristics of the sorbent and filters were investigated. The static exchange capacity is 3-4 meq/g for cationic sorbents and 1-2 meq/g for anionic sorbents. The removal coefficient of listed radionuclides from drinking water by the filter is 102 - 103. 

In the two studies cited above, although the SMA model was able to predict separation behavior on one type of column, this was not the case with the other column type, which yielded poor separations. Unfortunately, opposite results were obtained in the studies where SMA calculations were able to predict displacement behavior better for the monolithic anion exchange column [26] the reverse was true for the cation exchange columns tested in the later study [27]. Trial-and-error optimization on the monolithic cation exchange column yielded a separation comparable to that shown in Figure 11.4b, but required a dramatic change in pH (from 7.2 to 5). Unfortunately, the authors made little comment in the later paper about the apparent discrepancy in these results. 

The % ring substitution of the polymer is a critical factor in catalytic activity. Its importance was demonstrated clearly in Regen s first full paper on triphase catalysis 89). Catalysts 2 and 13 (2% CL) were active for cyanide displacement on 1-bromooctane (Eq. (3)) only at 21 % or lower RS (Table 3). Commerical anion exchange resins, polystyrenes highly substituted as benzyltrimethylammonium ions 2 or benzyldimethyl-(2-hydroxyethyl)ammonium ions 14, were inactive. 

Later Cerrai and Triulzi [122] used a mixture of 3M HNO3 and 80% CH3OH as solvent on Whatman cellulose paper DE-20 to separate La, Ce, Pr, Nd, Sm and Gd. Whatman DE-20 is a cellulose anion exchanger containing amine groups bonded to the cellulose matrix. 

The application of cellulosic anion exchanger in the separation of trace amounts of rare earths has also been investigated. Diethylaminoe-thyl cellulose paper and 0.026M citric acid were found to be the most satisfactory. A separation factor of 2.6 between Eu and Ce was obtained [123]. It has been found [124] that a mixture of HC1 and various aliphatic alcohols can be successfully used as eluant for the separation of rare earths by paper chromatography (Whatman No. 1). 

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