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LCGC North America-01-01-2011
LCGC North America
New Directions in Whole Blood Analysis: Dried Blood Spot Analysis and Beyond
January 01, 2011
Sample Prep Perspectives
29
1
New methods are available for whole blood analysis. Here, various approaches are compared and contrasted.
Making Elephants Fly
January 01, 2011
From the Editor
29
1
When good things are given to us, or when we have never known life without them, we rarely appreciate them fully. This truth applies to many areas of life, but tends to be particularly evident with respect to modern conveniences and technological advances. Anyone with a teenager who thinks having a cell phone or an iPod is a requirement, not a luxury, knows this; pointing out that every generation until this one grew up without such devices rarely elicits more than eye rolling. Young people are not the only ones who take things for granted, however. When was the last time most of us truly felt grateful for our flush toilets or hot showers? Probably shortly after a camping trip or when the water heater broke.
Toward a Universal Detector for Small Molecule Applications: Direct-EI in LC–MS
January 01, 2011
Articles
29
1
This article describes the operating principles of the direct-electron ionization (EI) interface, which is becoming more popular in many LC–MS applications. Matrix effects and the role of direct-EI as a universal detector for small molecule analysis are also discussed in detail. The advantages and drawbacks of this approach are described and a comparison with atmospheric pressure ionization (API) interfaces is made. The potential of direct-EI is illustrated with a selection of practical applications.
Quantification of Total w-6 and w-3 Fatty Acids and w-6/w-3 Ratio in Human Serum Using GC-MS
January 01, 2011
Articles
29
1
This article demonstrates the superiority of the GC-MS approach over spectrophotometry.
The Direct Analysis of Diquat and Paraquat in Lake Water Samples by per Aqueous Liquid Chromatography
January 01, 2011
Articles
29
1
The authors discuss an LC method for the direct analysis of diquat and paraquat in lake water.
Analytical Method Validation: Back to Basics, Part II
January 01, 2011
Validation Viewpoint
29
1
The authors discuss the specifics of analytical method validation.
Optimization of Asymmetrical Flow Field-Flow Fractionation
January 01, 2011
Articles
29
1
This article illustrates how to choose the best experimental parameters for asymmetrical flow field-flow fractionation.
Selectivity in Reversed-Phase LC Separations, Part II: Solvent-Strength Selectivity
January 01, 2011
LC Troubleshooting
29
1
A change in the mobile phase strength can be a powerful tool to move peaks in a separation.
Hydrogen Carrier Gas and Vacuum Compensation
January 01, 2011
GC Connections
29
1
John Hinshaw investigates the influence that choosing hydrogen carrier has on column selection and operation with direct-interface GC?MS.
Vol 29 No 1 LCGC North America January 2011 Regular Issue PDF
January 01, 2011
Issue PDF
29
1
Click the title above to open the LCGC North America January 2011 regular issue, Vol 29 No 1, in an interactive PDF format.