Principles of Instrumental Analysis
7th Edition
ISBN: 9781337468039
Author: Skoog
Publisher: Cengage
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Question
Chapter 27, Problem 27.1QAP
Interpretation Introduction
Interpretation:
The difference between the gas-liquid and gas-solid chromatography is to be stated.
Concept introduction:
Chromatography is a technique or method used to separate the constituents of a mixture. The mixture is first dissolved in a type of fluid that is known as the mobile phase. This phase is carried through the stationary phase. The constituents travel at different speeds due to which they get separated. There are two types of chromatography methods. These include gas-solid chromatography and the gas-liquid chromatography
Expert Solution & Answer
Answer to Problem 27.1QAP
In gas-solid chromatography, the solid surface is a stationary phase, which retains the analytes on it by the process of physical adsorption. In gas-liquid chromatography, the liquid that is stopped on a solid is the stationary surface.
Explanation of Solution
The differences between the gas-liquid and gas-solid chromatography are as mentioned below.
| Gas-Solid Chromatography | Gas-Liquid Chromatography |
| The solid state is the stationary phase. | The liquid state is the stationary phase. |
| Gas-Solid Chromatography can be used at high temperatures. | Gas-Liquid Chromatography cannot be used at high temperatures. |
| The stationary phase is stable. | The stationary phase is not stable. |
| The stationary phase is deposited in the column as a solid compound. | The stationary phase is deposited in the column as a liquid film. |
Conclusion
Thus, in gas-solid chromatography, the solid surface is a stationary phase, which retains the analytes on it by the process of physical adsorption. In gas-liquid chromatography, the liquid that is stopped on a solid is the stationary surface.
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3. Predict the major product and give a mechanism for the following reactions:
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a)
b)
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Indicate if the aldehyde shown reacts with the provided nucleophiles in acid or base
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a NaBH4
be Li
eli
-NH2
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f
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g
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h CH3OH
i NaCHCCH3
Predict the major products of the following organic reaction:
+
A
?
Some important notes:
• Draw the major product, or products, of the reaction in the drawing area below.
• If there aren't any products, because no reaction will take place, check the box below the drawing area instead.
• Be sure to use wedge and dash bonds when necessary, for example to distinguish between major products that are
enantiomers.
Explanation
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Click and drag to start drawing a structure.
C
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Chapter 27 Solutions
Principles of Instrumental Analysis
Ch. 27 - Prob. 27.1QAPCh. 27 - Prob. 27.2QAPCh. 27 - Prob. 27.3QAPCh. 27 - Prob. 27.4QAPCh. 27 - Prob. 27.5QAPCh. 27 - Prob. 27.6QAPCh. 27 - Prob. 27.7QAPCh. 27 - Prob. 27.8QAPCh. 27 - Prob. 27.9QAPCh. 27 - What are hyphenated GC methods? Briefly describe...
Ch. 27 - Prob. 27.11QAPCh. 27 - Prob. 27.12QAPCh. 27 - Prob. 27.13QAPCh. 27 - Prob. 27.14QAPCh. 27 - Prob. 27.15QAPCh. 27 - Prob. 27.16QAPCh. 27 - Prob. 27.17QAPCh. 27 - Prob. 27.18QAPCh. 27 - Prob. 27.19QAPCh. 27 - The same polar compound is gas chromatographed on...Ch. 27 - Prob. 27.21QAPCh. 27 - Prob. 27.22QAPCh. 27 - Prob. 27.23QAPCh. 27 - Prob. 27.24QAPCh. 27 - Prob. 27.25QAPCh. 27 - Prob. 27.26QAPCh. 27 - Prob. 27.27QAPCh. 27 - Prob. 27.28QAPCh. 27 - Why is GSC not used nearly as extensively as GLC?Ch. 27 - Prob. 27.30QAP
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