Chat with AIExam 6: Chromatography
How can GC be used to quantitate an unknown sample? What samples are run, what is measured and how is this used to calculate the unknown quantity?
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Answered by Examlex AI CopilotGas chromatography (GC) can be used to quantitate an unknown sample by comparing its retention time and peak area to those of known standards.
First, a series of known standards with known concentrations are run through the GC to create a calibration curve. These standards should cover the range of concentrations expected in the unknown sample.
Once the calibration curve is established, the unknown sample is run through the GC. The retention time and peak area of the unknown sample are then compared to those of the standards. The retention time is used to identify the compound, while the peak area is proportional to the concentration of the compound in the sample.
By comparing the peak area of the unknown sample to the calibration curve, the concentration of the compound in the unknown sample can be determined. This is done by using the equation of the calibration curve to calculate the concentration of the compound in the unknown sample based on its peak area.
In summary, GC is used to quantitate an unknown sample by running known standards, measuring the retention time and peak area, and using this information to calculate the concentration of the compound in the unknown sample.
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