摘要:

Ion-exchange and ligand-exchange chromatography with the modified sporopollenin is a useful technique for the rapid separation of nucleosides, nucleotides, amino acids, amines and transition elements.

ISSN:0003-2719    

DOI:10.1080/00032718808055753

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The sorption behaviour of gold in the presence of amines on different kinds of cationic exchangers with phosphonic groups has bee investigated. The system Cellex P - amine has been found very useful for gold separation from platinum metals. The method was adopted for trace gold determination in PdC12and platinum powder.

ISSN:0003-2719    

DOI:10.1080/00032718808055754

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

A rapid procedure has been developed for the analysis of orthophosphate, sulfate and chloride in riverine sediment interstitial water samples which have dissolved iron concentrations ranging from 0.5–2 mmol L−1. Interferences caused by the precipitation of iron hydroxides resulting from air oxidation of ferrous iron in the anoxic samples and from the alkaline working pH range (9.0 – 10.5) of the Dionex1ion chromatographic system were eliminated by complexing the iron with cyanide. Orthophosphate concentration values are compared with dissolved reactive phosphate concentration data for the same samples. Orthophosphate concentrations rather than dissolved reactive phosphate concentrations are preferred for phosphate mineral solubility calculations and for phosphorus nutrient measurements.

ISSN:0003-2719    

DOI:10.1080/00032718808055755

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

A new technique based on electrosorption is presented for the determination of selected anions in ion chromatography. Unlike conventional methods, which are based on the measurement of nonfaradaic currents, the present method utilizes a kinetic facilitation imparted to the electroreduction of a cationic “adsorbate probe” by specifically adsorbed anions, and hence involves the measurement of faradaic currents. Amminated, transition-metal salts of Co(III) have been found most useful as adsorbate probes for this application. The current enhancement-analyte concentration response curves obtained were determined to be linear over a limited range at mercury, but show curvature at virtually all concentrations at silver. Detection limits for this technique are slightly higher than those realized using more conventional double-layer capacitance methods. A brief discussion of the future prospects for this new approach is given.

ISSN:0003-2719    

DOI:10.1080/00032718808055756

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0003-2719    

DOI:10.1080/00032718808055742

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor