scholarly journals Development of a fritless packed column for capillary electrochromatography–mass spectrometry

2011 ◽  
Vol 1218 (48) ◽  
pp. 8691-8700 ◽  
Author(s):  
William Bragg ◽  
Shahab A. Shamsi
Keyword(s):  
Mass Spectrometry ◽  
Capillary Electrochromatography ◽  
Packed Column

Capillary Electrochromatography-Mass Spectrometry of Kynurenine Pathway Metabolites

2021 ◽  
pp. 462294
Author(s):  
A.S.M.M.R. Chawdhury ◽  
Shahab A. Shamsi ◽  
Andrew Miller ◽  
Aimin Liu
Keyword(s):  
Mass Spectrometry ◽  
Capillary Electrochromatography ◽  
Kynurenine Pathway

Capillary electrochromatography/nanoelectrospray mass spectrometry for attomole characterization of peptides

2000 ◽  
Vol 14 (16) ◽  
pp. 1448-1454 ◽  
Author(s):  
Marjan Gu??ek ◽  
Marco Gaspari ◽  
Karin Walhagen ◽  
Rob J. Vreeken ◽  
Elwin R. Verheij ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Capillary Electrochromatography

Determination of Phytosterols in Butter Samples by Using Capillary Column Gas Chromatography

1987 ◽  
Vol 70 (5) ◽  
pp. 912-915 ◽  
Author(s):  
Randall L Smith ◽  
Darryl M Sullivan ◽  
Earl F Richter
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Retention Time ◽  
Capillary Column ◽  
Limit Of Detection ◽  
Packed Column ◽  
Gas Chromatography Mass Spectrometry ◽  
Positive Bias ◽  
Capillary Column Gas Chromatography

Abstract A positive bias in the gas chromatographic (GC) analysis of butter for β-sitosterol was discovered when attempting to confirm values by gas chromatography/mass spectrometry (GC/MS). The source of the problem was traced to an interfering material that was not effectively separated by packed column GC. Because capillary columns are known to provide superior separation, they were substituted for packed columns in the assay, and instrument parameters were modified accordingly. A compound with a similar retention time, identified by GC/MS as lanosterol, was separated from β-sitosterol by the capillary column. The capillary column technique was applied to over 300 butter samples. The results indicate that the method can accurately quantitate β-sitosterol in butter with no known interferences. The limit of detection for this method is 1 mg/100 g. Recoveries at a level of 3 mg/100 g averaged 98% with a coefficient of variation of 3.45%

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