ISSN:
0173-0835
Keywords:
Chemistry
;
Biochemistry and Biotechnology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
An electrolyte system involving 2-pyridinecarboxylate (Pic) buffer as the leading and formic acid as the terminating electrolyte was suggested for cationic capillary isotachophoresis of bases with low mobilities. Parameters of the system were studied for concentrations of the leading K+ ion of 1-30 mmol/L and for the Hpic/Kpic ratios of 3:1, 1:1 and 1:3 in the buffer. The effective mobility of the terminating H+ ion ranged between 3 and 30 X 10-9 m2V-1s-1 depending on the composition of the electrolyte system. The applicability of the system (at optimum concentration of K+ 5 mmol/L and the HPic/Kpic ratio 1:1) to the analysis of bases was characterized by a zone existence diagram and demonstrated by the separation of a model mixture containing tetramethylammonium, tetraethylammonium, tris(hydroxymethyl)aminomethane, ephedrine, codeine, nortriptyline, 1,10-phenanthroline, aminophenazone and 4-aminoantipyrine.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/elps.1150070910
