1. What are the advantages and disadvantages to the method of internal standards? 2. If someone made...

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Chemistry

1. What are the advantages and disadvantages to the method ofinternal standards?
2. If someone made a mistake while preparing the unknown byadding too much solvent and going over the mark on the volumetricflask, how would the results be affected?
3. What is the purpose of the temperature ramp in the GCprogram? Based on your chromatogram, was the use of a rampsuccessful? Why/why not?
4. The internal standard method accounted for variation ininjection volume. However, in some instances it would be useful toknow how much variability there was in injection volume. How couldyou estimate the variability in the manually injected volume?

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3.7 Ratings (522 Votes)

2 if excess solvent is added in volumetric flask thar result tochange in the concentration of solution but there is no change infinal resolution3 There are two ways to affect the selectivity of a GCseparation Changing the chemical nature of the stationary phaseand altering the temperature either the isothermal temperature orthe ramp rate oCmin in a temperature programmedseparationEach component is identified by comparing its retention timethe length of time that it remains in the column to that of astandard The retention time of a vapor depends on the See Answer

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