Chapter 27: Q.27.8 (page 741)
What is the difference between a total-ion chromatogram and a mass chromatogram?
A mass chromatogram is a graphical representation depicting mass spectrometry data.
A total-ion chromatogram gives a summed result of all spectrums .
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What are megabore open tubular columns? Why are they used?
Why are gas chromatographic stationary phases often bonded and cross-linked? What do these terms mean?
What is the packing material used in most packed GC columns?
Use the retention data given in the following table to calculate the retention index of
Determine the concentration of species in a sample using the peak areas and relative detector responses for the five gas chromatographic peaks given in the following table. Use the area-normalization method. One method for quantitative determination of the concentration of constituents in a sample analyzed by is the area-normalization method. Here, complete elution of all of the sample constituents is necessary. The area of each peak is then measured and corrected for differences in detector response to the different eluates. This correction involves dividing the area by an empirically determined correction factor. The concentration of the analyte is found from the ratio of its corrected area to the total corrected area of all peaks. Also shown are the relative responses of the detector. Calculate the percentage of each component in the mixture.
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