Chromatographic evaluation using basic solutes of the silanol activity of stationary phases based on poly(methyloctylsiloxane) immobilized onto silica

2011 ◽  
Vol 34 (10) ◽  
pp. 1141-1148 ◽  
Author(s):  
Endler M. Borges ◽  
Carol H. Collins
Keyword(s):  
Stationary Phases ◽  
Basic Solutes

Enantioseparation of 3α-acyloxy-6β-acetoxyltropane compounds with Chiralpak AD and Chiralcel OD-H chiral stationary phases

2015 ◽  
Vol 33 (6) ◽  
pp. 647
Author(s):  
Bin CHENG ◽  
Yifan XIE ◽  
Youmin HU ◽  
Huizhong LIU ◽  
Yinyao NIU ◽  
...  
Keyword(s):  
Stationary Phases ◽  
Chiral Stationary Phases ◽  
Chiralcel Od

Analysis of Aromatic Amines in Industrial Wastewater by Capillary Gas Chromatography-Mass Spectrometry

2000 ◽  
Vol 35 (2) ◽  
pp. 245-262 ◽  
Author(s):  
Francis I. Onuska ◽  
Ken A. Terry ◽  
R. James Maguire
Keyword(s):  
Gas Chromatography ◽  
Aromatic Amines ◽  
Methylene Chloride ◽  
Solid Phase ◽  
Stationary Phases ◽  
Gas Chromatography Mass Spectrometry ◽  
Substituted Anilines ◽  
Environmental Media ◽  
Solid Phase Extraction Cartridge ◽  
Wide Range

Abstract The analysis of aromatic amines, particularly benzidines, at trace levels in environmental media has been difficult because of the lack of suitable deactivated capillary column stationary phases for gas chromatography. This report describes the use of an improved type of column as well as a method for the analysis of anilines and benzidines in water, wastewater and sewage samples. Extraction procedures are applicable to a wide range of compounds that are effectively partitioned from an aqueous matrix into methylene chloride, or onto a solid-phase extraction cartridge. The extracted analytes are also amenable to separation on a capillary gas chromatographic column and transferable to the mass spectrometer. These contaminants are converted to their N-trifluoroacetyl derivatives. Aniline and some substituted anilines, and 3,3’-dichlorobenzidine and benzidine were determined in 24-h composite industrial water, wastewater, primary sludge and final effluent samples at concentrations from 0.03 up to 2760 µg/L.

A CONTRIBUTION TO THE QUALITATIVE GC ANALYSIS OF SOME NON-CHLORINATED XENOBIOTIC CHEMICALS IN WASTE WATERS

1994 ◽  
Vol 30 (3) ◽  
pp. 91-93 ◽  
Author(s):  
Biljana D. Škrbic ◽  
Mirjana B. Vojinovic-Miloradov
Keyword(s):  
Experimental Data ◽  
Stationary Phases ◽  
Retention Indices ◽  
Waste Waters ◽  
Gc Analysis ◽  
Experimental Values ◽  
Xenobiotic Chemicals

Gas chromatographic unified retention indices of some chlorinated xenobiotic chemicals, as pollutants in waste waters, on OV-101 and SE-30 stationary phases are presented. These values agree well with the corresponding experimental values used in the statistical treaunent of the experimental data.

Analysis of nonsteroidal anti-inflammatory drugs by using microfluidic techniques: a review

2020 ◽  
Vol 16 ◽  
Author(s):  
Chiara Fanali ◽  
Giovanni D’Orazio ◽  
Alessandra Gentili ◽  
Salvatore Fanali
Keyword(s):  
Stationary Phases ◽  
Low Flow ◽  
High Mass ◽  
Internal Diameter ◽  
Uv Detectors ◽  
On Line ◽  
Inflammatory Drugs ◽  
Anti Inflammatory ◽  
Silica Phases ◽  
Liquid Chromatographic

: In this review paper, miniaturized techniques, including both electromigration and liquid chromatographic ones, have been considered discussing their main features in the analytical field for the separation and analysis of nonsteroidal anti-inflammatory drugs (NSAIDs). In capillary electrophoresis (CE) and nano-liquid chromatography (nano-LC), separation are performed in capillaries with internal diameter (I.D.) lower than 100 m and therefore flow rates in the range 100- 1000 nL/min are applied. Therefore due to the low flow rate, high mass sensitivity can be obtained. Usually conventional UV detectors are used on-line; however these techniques can be coupled with mass spectrometry (MS). CE and nano-LC have been also applied to the separation of NSAIDs using silica stationary phases (SP) modified with C18 promoting interaction with analytes mainly based on hydrophobic interaction. In addition the use of chiral SP resulted effective for the chiral resolution of these compounds. In addition to silica phases, monolithic (both organic and inorganic) material has also been used. Although most of the presented studies aimed to demonstrate the usefulness of the considered microfluidic techniques, some applications to real samples have also been reported.

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