Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Frederick S. Stover"'
Publikováno v:
Journal of the American Ceramic Society. 84:1025-1032
Alkali aluminophosphate glasses, including those in the system xAl2O3·(1−x)CsPO3 (0 ≤x≤ 0.25), were examined by high-performance liquid chromatography (HPLC), infrared (IR), and 27Al magic angle spinning nuclear magnetic resonance (MAS NMR) sp
Autor:
Frederick S Stover
Publikováno v:
Journal of Chromatography A. 834:243-256
Capillary electrophoresis (CE) is a useful technique for separating and quantitating the various inorganic phosphorus oxo anions (phosphates, phosphites and their oligomers). This paper reviews work to date on analyses for the oxo anions of phosphoru
Autor:
Robert V Brill, Frederick S Stover
Publikováno v:
Journal of Chromatography A. 804:37-43
Multivariate statistical quality control principles, including control charting of calibration parameters and control samples, are applied to multilevel ion chromatography (IC) calibrations to determine instrument response stability and minimum calib
Publikováno v:
Journal of Chromatography A. 688:89-95
The separation of linear and cyclic polyphosphates with chain lengths of 1 to ca. 30, using 2 mm I.D. polymeric ion-exchange columns and suppressed conductivity detection, is described. The separations are characterized by good resolution of phosphat
Autor:
Sherry S. Keffer, Frederick S. Stover
Publikováno v:
Journal of Chromatography A. 657:450-454
A capillary zone electrophoresis (CZE) separation of ortho-, pyro- and tripolyphosphate anions using a phthalate buffer and indirect UV detection is described. Advantages of a CZE method for phosphates include speed, efficiency and unique selectivity
Autor:
Frederick S. Stover
Publikováno v:
Journal of Chromatography A. 769:349-351
Capillary electrophoretic separations of sodium polyphosphates with anion chain lengths from 1 to >30 are presented. A buffer containing pyromellitic acid, triethanolamine and hexamethonium hydroxide gives a high resolution separation of linear and c
Autor:
Frederick S. Stover
Publikováno v:
Electrophoresis. 11(9)
Capillary electrophoresis techniques, particularly isotachophoresis and zone electrophoresis, are useful for the determination of various analytes in a wide range of sample matrices. This paper reports applications of capillary electrophoresis develo
Publikováno v:
Analytica Chimica Acta. 135:347-350
Summary Isotachophoresis is used to determine organic phosphonates formed during electrolysis of nitrilotri(methylenephosphonic acid). A mixture of commercially useful phosphonates can also be separated. Modification of the leading electrolyte by add
Autor:
Richard P. Buck, Frederick S. Stover
Publikováno v:
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry. 107:165-175
Equations are derived which describe the current-voltage behavior of thick, mobile site ion exchangers with Donnan extraction of co-ions. The equations are transcendental in nature and are solved numerically. Passing current results in distance-depen
Publikováno v:
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry. 100:63-70
Potentiometric responses of Aliquat-nitrate liquid ion exchanger membranes in nitrobenzene, at various loadings, have been measured for bathing solutions of tetraethyl through tetrapentyl ammonium nitrates. Deviations from Nernstian nitrate responses