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Books > Science & Mathematics > Chemistry > Analytical chemistry > Qualitative analytical chemistry > Chromatography
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Analytical Gas Chromatography (Hardcover, 2nd edition)
Loot Price: R4,096
Discovery Miles 40 960
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Analytical Gas Chromatography (Hardcover, 2nd edition)
Expected to ship within 10 - 15 working days
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Gas chromatography remains the world's most widely used analytical
technique, yet the expertise of a large proportion of
chromatographers lies in other fields. Many users have little real
knowledge of the variablesin the chromatographic process, the
interaction between those variables, how they are best controlled,
how the quality of their analytical results could be improved, and
how analysis times can be shortened to facilitate the generation of
a greater numberof more reliable results on the same equipment. An
analyst with a more comprehensive understanding of chromatographic
principles and practice, however, can often improve the quality of
the data generated, reduce the analytical time, and forestall the
needto purchase an additional chromatograph or another mass
spectrometer.The Second Edition of Analytical Gas Chromatography is
extensively revised with selected areas expanded and many new
explanations and figures. The section on sample injection has been
updated to include newer concepts of split, splitless, hot and cold
on-column, programmed temperature vaporization, and large volume
injections. Coverage of stationary phases now includes discussion,
applications, and rationale of the increased thermal and oxidative
resistance of the newly designed silarylenepolysiloxane polymers.
Conventional and"extended range"polyethylene glycol stationary
phases are examined from the viewpoints of temperature range and
retention index reliabilities, and the chapter on"Variables"has
been completely rewritten. The ways in which carrier gas velocity
influences chromatographic performance is considered in detail, and
includes what may be the first rational explanation of the
seemingly anomalous effects that temperature exercises on gas
viscosity (and gas flow). The practical effects that these changes
cause to the chromatography is examined in pressure-, flow-,
and"EPC-"regulated systems."Column Selection, Installation, and
Use"has been completely rewritten as well. The accuracy of theVan
Deemter plots has been greatly enhanced; a new program corrects for
the first time for the changes in gas density and diffusion that
occur during the chromatographic process because of solute
progression through the pressure drop of the column. A new section
has also been added on meeting thespecial requirements of columns
destined for mass spectral analysis. The chapter on"Special
Applications"has been expanded to include considerations
of"selectivity tuning,"of fast analysis, and the section of
Applications has been thoroughly updated and expanded.
Key Features
* Incorporates nearly 60% new material
* Covers the newest concepts and materials for sample injection and
stationary phases
* Presents detailed consideration of the influence of carrier gas
velocity on practical aspects of chromatographic performance
* Contains a chapter on "Special Analytical Techniques" which
includes consideration of selectivity tuning and fast
analysis
* Provides a new section addressing the special requirements of
columns to be used in mass spectral analysis
* Includes an improved program that greatly enhances the accuracy
of the Van Deemter plots by more accurately depicting localized
chromatographic conditions at each point in the column
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