Linear relationship between relative retention value of programmed temperature gas chromatography and logarithmic relative retention value of isothermal gas chromatography
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چکیده
منابع مشابه
Evaluation of retention time for temperature-programmed gas chromatography by use of a closed-form integral.
A closed-form integral for the Arrhenius exponential was obtained by using an approximate relation instead of the usual one in a linear temperature program. The closed-form integral can be applied to predict the retention time very well both for a packed column and for a capillary column, in constant the velocity mode.
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Novel packed-capillary columns for gas chromatography were developed with a thin-wall stainless-steel capillary of 1.0 mm i.d.; and rapid temperature-programmed separations have been carried out after a basic evaluation concerning the compatibility of these columns to the temperature program. With a numerical integration method, the retention of several test analytes during temperature-programm...
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Polybrominated organic compounds are ubiquitous throughout the environment. This generic term comprises several classes of brominated flame retardants (e.g., polybrominated diphenyl ethers, polybrominated biphenyls, hexabromocyclododecane, dibromopropyltribromophenyl ether, 1,2-bis(2,4,6-tribromophenoxy)ethane) as well as a range of marine halogenated natural products (HNPs). Here we present ga...
متن کاملGas Chromatography I. Retention, Efficiency and Resolution Purpose
Purpose In this experiment you will examine the effect of temperature on retention in isothermal gas chromatography, and use this information to determine the heat of solution of the solute in the stationary phase and to determine the temperature for optimum retention. You will also examine the effect of flow rate on efficiency and construct a van Deemter plot, and determine the flow rate for o...
متن کاملMolecular structure retention relationships in comprehensive two-dimensional gas chromatography.
Comprehensive two-dimensional gas chromatography (GC x GC) offers new opportunities to develop relationships between molecular structure and retentions in the two dimensional (2D) separation space defined by the GC x GC retention in each dimension. Whereas single dimension GC provides only one retention property for a solute, and hence the specific relationship between retention and chemical pr...
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ژورنال
عنوان ژورنال: BUNSEKI KAGAKU
سال: 1973
ISSN: 0525-1931
DOI: 10.2116/bunsekikagaku.22.36