Question

4. Retention time is characteristic property of
a) stationary phase b) mobile phase
c) carrier gas
d) sample components​

Answer 1

Answer:

(b) Mobile phase

Explanation:

Retention time (RT) is a measure of the time taken for a solute to pass through a chromatography column. It is calculated as the time from injection to detection.

Answer 2

Answer:

The correct answer is (b) mobile phase.

- Retention time is characteristic property of mobile phase.

Explanation:

• The time it taken for a solute to pass through a given chromatography column is measured in retention time (RT).
• Here, the time from injection to detection is used to compute it.
• Even though the same GC and column are used, the RT for a molecule is not always fixed because various things might influence it during its observation.
• The gas flow rate is one of them.
• The time passed between the injection of the sample (the start of the chromatogram) and the highest signal of the given compound at the detector is known as the retention time (RT).
• In gas chromatography mass spectrometry testing, the mobile phase is used.
• It is an inert gas into which the sample is introduced and which will take it through the stationary phase and make it mobile.
• The shorter time a compound spends being transported along by the gas, the more soluble it is in the liquid phase.
• Further, In the liquid phase, high solubility translates to a long retention time.
• The retention duration is determined by a number of parameters, including the analytical settings, column type, column dimension, column deterioration, and the presence of active sites such as contamination.

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