Insights into cyclodextrin interactions during sample stacking using capillary isotachophoresis with on-line microcoil NMR detection

2005 ◽  
Vol 43 (9) ◽  
pp. 755-761 ◽  
Author(s):  
Valentino K. Almeida ◽  
Cynthia K. Larive
Keyword(s):  
Capillary Isotachophoresis ◽  
Sample Stacking ◽  
Microcoil Nmr ◽  
On Line

Separation and Analysis of Nanomole Quantities of Heparin Oligosaccharides Using On-Line Capillary Isotachophoresis Coupled with NMR Detection

2005 ◽  
Vol 77 (18) ◽  
pp. 5998-6003 ◽  
Author(s):  
Albert K. Korir ◽  
Valentino K. Almeida ◽  
Douglas S. Malkin ◽  
Cynthia K. Larive
Keyword(s):  
Capillary Isotachophoresis ◽  
On Line ◽  
Heparin Oligosaccharides

Identification of Cationic Herbicides in Deionized Water, Municipal Tap Water, and River Water by Capillary Isotachophoresis/On-Line Raman Spectroscopy

1997 ◽  
Vol 51 (9) ◽  
pp. 1394-1399 ◽  
Author(s):  
Patrick A. Walker ◽  
Jeremy M. Shaver ◽  
Michael D. Morris
Keyword(s):  
Drinking Water ◽  
River Water ◽  
Electrolyte Solution ◽  
Tap Water ◽  
Deionized Water ◽  
Capillary Isotachophoresis ◽  
Raman Spectroscopic ◽  
River Water Samples ◽  
On Line ◽  
Detection Window

Isotachophoresis (ITP), coupled with Raman spectroscopic detection, is used to separate and identify two cationic herbicides, paraquat and diquat, in spiked deionized water, municipal drinking water, and river water samples. On-line preconcentration is achieved with the use of field-amplified injection into a 0.03–0.1 M H2SO4 or Na2SO4 leading electrolyte solution, and isotachophoresis is achieved with the use of a 0.03–0.1 M tris(hydroxymethyl)—aminomethane (Tris) trailing electrolyte solution. The herbicides are concentrated to above 10−3 M at the detection window, allowing measurement of Raman spectra with 1-s integration windows. Spectra of the herbicides are obtained from solutions at initial concentrations in deionized water at 3.5 × 10−7 M (90 ppb) paraquat/5.8 × 10−8 M (20 ppb) diquat, from drinking water initially at 1.3 × 10−6 M (335 ppb) paraquat/1.0 × 10−6 M (360 ppb) diquat, and river water initially at 5.0 × 10−6 M (1.3 ppm) paraquat and 3.0 × 10−6 M (1.0 ppm) diquat. The utility of correlation to identify the presence of analytes and of factor analysis to recover spectra from solutions at low initial concentrations of the herbicides is demonstrated.

On-line coupling of capillary isotachophoresis and zone electrophoresis for the assay of phenolic compounds in plant extracts

2002 ◽  
Vol 23 (7-8) ◽  
pp. 1045-1052 ◽  
Author(s):  
Marek Urbánek ◽  
Marie Pospíšilová ◽  
Miroslav Polášek
Keyword(s):  
Phenolic Compounds ◽  
Plant Extracts ◽  
Capillary Isotachophoresis ◽  
Zone Electrophoresis ◽  
On Line ◽  
Line Coupling

On-line preconcentration and determination of six sulfonylurea herbicides in cereals by MEKC with large-volume sample stacking and polarity switching

2013 ◽  
Vol 34 (9-10) ◽  
pp. 1304-1311 ◽  
Author(s):  
Ling-Xiao Yi ◽  
Guan-Hua Chen ◽  
Rou Fang ◽  
Li Zhang ◽  
Yu-Xiu Shao ◽  
...  
Keyword(s):  
Large Volume ◽  
Sulfonylurea Herbicides ◽  
Sample Stacking ◽  
Polarity Switching ◽  
On Line ◽  
Large Volume Sample Stacking

On-line NMR detection of microgram quantities of heparin-derived oligosaccharides and their structure elucidation by microcoil NMR

2007 ◽  
Vol 388 (8) ◽  
pp. 1707-1716 ◽  
Author(s):  
Albert K. Korir ◽  
Cynthia K. Larive
Keyword(s):  
Structure Elucidation ◽  
Microcoil Nmr ◽  
On Line

Field-amplified on-line sample stacking for separation and determination of cimaterol, clenbuterol and salbutamol using capillary electrophoresis

2006 ◽  
Vol 1125 (1) ◽  
pp. 124-128 ◽  
Author(s):  
Yanfang Shi ◽  
Ying Huang ◽  
Jianping Duan ◽  
Hongqing Chen ◽  
Guonan Chen
Keyword(s):  
Capillary Electrophoresis ◽  
Sample Stacking ◽  
On Line ◽  
Line Sample

Quantitative trace analysis ofL-ascorbic acid in human body fluids by on-line combination of capillary isotachophoresis and zone electrophoresis

1998 ◽  
Vol 19 (2) ◽  
pp. 300-304 ◽  
Author(s):  
Andrea Procházková ◽  
Ludmila Křivánková ◽  
Petr Boček
Keyword(s):  
Ascorbic Acid ◽  
Human Body ◽  
Trace Analysis ◽  
Body Fluids ◽  
Capillary Isotachophoresis ◽  
Zone Electrophoresis ◽  
On Line

Determination of domoic acid by on-line coupled capillary isotachophoresis with capillary zone electrophoresis

2006 ◽  
Vol 1113 (1-2) ◽  
pp. 255-258 ◽  
Author(s):  
František Kvasnička ◽  
Rudolf Ševčík ◽  
Michal Voldřich
Keyword(s):  
Capillary Zone Electrophoresis ◽  
Domoic Acid ◽  
Capillary Isotachophoresis ◽  
Zone Electrophoresis ◽  
On Line ◽  
Capillary Zone
Sign in / Sign up

Export Citation Format

Share Document