Gas Chromatography
A Quick Historical Perspective
¢ 1903 Adsorption chromatography
¢ 1952 Gas chromatography (GLC)
¢ 1968 High performance liquid chromatography (HPLC)



Gas Chromatography
HPLC
¢ Mobile phase changes
¢ Constant temperature
¢ Compounds partition from the mobile phase based on solubility.
¢ Elution is generally time or volume dependent


GC
¢ Mobile phase is constant
¢ Increasing temperature
¢ Compounds partition from the mobile ....etc

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(d) When reacted with a small quantity of water, SiCl 4 produces an oxychloride X, SixClyOz.
The mass spectrum of X shows peaks at mass numbers of 133, 149, 247, 263 and 396.
(You should assume that the species responsible for all these peaks contain the 16O,the 35Cl and the 28Si isotopes only.)
(i) Use these data to deduce the molecular formula of X. ....etc

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hello
I have t present a seminar on gel filtration chromatography.Need some good and useful ppt's ....etc

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Dear friend,
please send me the ppt of instrumentation of gas chromatography i need it ........ till tomorrow morning till 8a.m.
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A mass airflow sensor is used to determine the mass of air entering the engine. The air mass information is necessary to calculate and deliver the correct fuel mass to the engine. Air is a gas, and its density changes as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the vehicle\'s operating environment, and is an ideal application for a mass sensor. (See stoichiometric, ideal gas law, and density.)

There are two common types of mass airflow sensors in usage on gasoline engines. Th ....etc

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A mass airflow sensor is used to determine the mass of air entering the engine. The air mass information is necessary to calculate and deliver the correct fuel mass to the engine. Air is a gas, and its density changes as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the vehicle's operating environment, and is an ideal application for a mass sensor. (See stoichiometric, ideal gas law, and density.)

There are two common types of mass airflow sensors in usage on gasoline engines. The ....etc

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1 Introduction
Chromatography is a powerful separation method that finds applications in all branch of science. Chromatography was invented and named by the Russian botanist Mikhail Tswett shortly after the turn of the last century. He employed this technique to separate various plant pigments such as chlorophylls and xanthophylls by passing solutions of these compounds through a glass column packed with finely divided calcium carbonate. The separated species appeared as colored bands on the column, which accounts fo ....etc

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A mass airflow sensor is used to determine the mass of air entering the engine. The air mass information is necessary to calculate and deliver the correct fuel mass to the engine. Air is a gas, and its density changes as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the vehicle's operating environment, and is an ideal application for a mass sensor. (See stoichiometric, ideal gas law, and density.)

There are two common types of mass airflow sensors in usage on gasoline engines. The ....etc

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Hi I'm Mohamed Mahmoud working as Lab scientist and I'm preparing presentation about GC and I need some animation to make it easier.
please send it to my email
[email protected] ....etc

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I want to do a project on gel permeation chromatography. how creative can i make with this topic? suggestions required. ....etc

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