- About
- Advertise
- Author Guidelines
- Contact MJH
- Editorial Advisory Board
- Ethics Policy
- Do Not Sell My Personal Information
- LCGC Staff
- Privacy Policy
- Permissions
- Subscriptions
- Terms and Conditions
© 2023 MJH Life Sciences™ and Chromatography Online. All rights reserved.
February 2000 | LCGC North America
The Effects of Inner Surface Roughness of Microbore Column Blanks on Column Performance
February 02, 2000
18
2
The efficiencies of microbore-2 columns, which are prepared from blanks that have a wide variety of inner surface roughness, drop sharply when the size of individual surface roughness features approaches the particle size of the packing material. The results suggest that two categories of packed column structure relate to the surface features and yield high and low efficiency columns. This installment of "Column Watch" discusses this conclusion in terms of the stability of an agglomerated layer of packing particles on the blank wall when subjected to shear forces during column packing.
Starting Out Right, Part III – The Role of the Solvent in Controlling Selectivity
February 01, 2000
18
2
Adapting the organic solvent strength and type can be an effective way to improve an isocratic separation.
A Noisy Problem
February 01, 2000
18
2
In the first of two "GC Connections" columns, Hinshaw responds to reader questions about the signal-to-noise ratio and what it means in practical terms.
Off-Duty Columns
February 01, 2000
18
2
A second installment of "GC Connections" answers a reader's question about dual-column gas chromatography systems and their proper maintenance.
Just e-Sign on the Bottom Line?
February 01, 2000
18
2
Column editor McDowall discusses electronic records and signatures and the effects of legislation regarding their use within the pharmaceutical industry.
Total Polychlorinated Biphenyl Quantification by Rapid Dechlorination Under Mild Conditions
February 01, 2000
18
2
The authors describe a method of reductive chlorination that enables the determination of total PCB content by gas chromatography with flame ionization detection.
LC–MS Analysis of Polymer Additives by Electron and Atmospheric-Pressure Ionization: Identification and Quantification
February 01, 2000
18
2
The authors investigated the two most popular types of interfaces for benchtop LC–MS systems – the particle interface and the atmospheric-pressure ionization interface – to learn how the information obtained separately from the two can be complementary.
Chromatography Data Systems, Part II: Specifying, Evaluating, and Selecting a System
February 01, 2000
18
2
In the second installment of this series, the author looks at the first phase of the life cycle of a new chromatography system, bringing together a number of elements of the workflow and the functions as they are used in the laboratory.
Indirect Suppressed-Conductivity Ion Chromatography
February 01, 2000
18
2
The authors demonstrate a new detection method for various anions of weak acids separated by ion chromatography and point out the main advantages of this method.