Questions from General Chemistry

Q: What are hyphenated gas chromatographic methods? Briefly describe three hyphenated methods

What are hyphenated gas chromatographic methods? Briefly describe three hyphenated methods.

Q: What are megabore open tubular columns? Why are they used?

What are megabore open tubular columns? Why are they used?

Q: How do the following capillary columns differ? a) PLOT

How do the following capillary columns differ? a) PLOT columns b) WCOT columns c) SCOT columns

Q: Why are gas chromatographic stationary phases often bonded and cross-linked

Why are gas chromatographic stationary phases often bonded and cross-linked? What do these terms mean?

Q: What properties should the stationary phase liquid for gas chromatography possess?

What properties should the stationary phase liquid for gas chromatography possess?

Q: What are the advantages of fused-silica capillary columns compared with

What are the advantages of fused-silica capillary columns compared with glass or metal columns?

Q: What is the effect of stationary phase film thickness on gas chromatograms

What is the effect of stationary phase film thickness on gas chromatograms?

Q: List the variables that lead to a) Band broadening

List the variables that lead to a) Band broadening b) Band separation in gas-liquid chromatography.

Q: One method for quantitative determination of the concentration of constituents in a

One method for quantitative determination of the concentration of constituents in a sample analyzed by gas chromatography is the area normalization method. In this method, complete elution of all the...

Q: Peak areas and relative detector responses are to be used to determine

Peak areas and relative detector responses are to be used to determine the concentration of the five species in a sample. The area normalization method described in Problem 30-20 is to be used. The re...