Home > Search Results: keywords:"total resolution product"
Search:
Search Tips :: Advanced Search
Search collections:
Sort by: Display results: Output format:
National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Testing and optimization of pressure modulator conditions for GCxGC analyses
 Ston, Martin ; Čabala, Radomír (advisor) ; Jelínek, Ivan (referee)
Pulse (fluid) pressure modulator was constructed for comprehensive gas chromatography. Optimal conditions of its connection to the gas chromatograph with a flame ionization detector were found for the analysis of selected mixture of volatile solvents. Pressure interdependences in the system and relations between dimensions of modulator capillaries and columns have been evaluated with respect to the length of the modulation period and pulse duration. Two non-polar columns (15 m × 0.25 mm DB-5MS, 10 m × 0.15 mm CP-Sil 5 CB) of the same stationary phase were tested to compare the separation efficiency in the first dimension and the DB-5MS column was selected. The Supelcowax 10 columns of the lengths 1, 2 and 3 m were compared in the second dimension. It was found that using of 3 m length column lead to the extension of analysis time, however the increase in separation efficiency in the second dimension was very evident. The experimental measurements have shown that the selected parameters for the evaluation of the separation efficiency (the peak capacity and total resolution product) were inappropriate. Gasoline, kerosene and diesel fuel were analyzed as examples of real samples. Amount of added ethanol as a biofuel additive was determined in the gasoline sample. Pulse pressure modulator was modified...
Detailed record
Testing and optimization of pressure modulator conditions for GCxGC analyses
 Ston, Martin ; Čabala, Radomír (advisor) ; Jelínek, Ivan (referee)
Pulse (fluid) pressure modulator was constructed for comprehensive gas chromatography. Optimal conditions of its connection to the gas chromatograph with a flame ionization detector were found for the analysis of selected mixture of volatile solvents. Pressure interdependences in the system and relations between dimensions of modulator capillaries and columns have been evaluated with respect to the length of the modulation period and pulse duration. Two non-polar columns (15 m × 0.25 mm DB-5MS, 10 m × 0.15 mm CP-Sil 5 CB) of the same stationary phase were tested to compare the separation efficiency in the first dimension and the DB-5MS column was selected. The Supelcowax 10 columns of the lengths 1, 2 and 3 m were compared in the second dimension. It was found that using of 3 m length column lead to the extension of analysis time, however the increase in separation efficiency in the second dimension was very evident. The experimental measurements have shown that the selected parameters for the evaluation of the separation efficiency (the peak capacity and total resolution product) were inappropriate. Gasoline, kerosene and diesel fuel were analyzed as examples of real samples. Amount of added ethanol as a biofuel additive was determined in the gasoline sample. Pulse pressure modulator was modified...
Detailed record

Interested in being notified about new results for this query?
Subscribe to the RSS feed.
Digital Repository :: Search :: Submit :: Personalize :: Help
Powered by Invenio v1.1.2
Maintained by admin.invenio@techlib.cz
This site is also available in the following languages:
Česky  English